RINEX Version 3.04 I

Total Page:16

File Type:pdf, Size:1020Kb

RINEX Version 3.04 I RINEX The Receiver Independent Exchange Format Version 3.04 International GNSS Service (IGS), RINEX Working Group and Radio Technical Commission for Maritime Services Special Committee 104 (RTCM-SC104) November 23, 2018 Acknowledgement: RINEX Version 3.02, 3.03 and 3.04 are based on RINEX Version 3.01, which was developed by: Werner Gurtner, Astronomical Institute of the University of Bern, Switzerland and Lou Estey, UNAVCO, Boulder, Colorado, USA. RINEX Version 3.04 i Table of Contents 0. REVISION HISTORY .............................................................................................................................. 1 1. THE PHILOSOPHY AND HISTORY OF RINEX .................................................................................. 9 2. GENERAL FORMAT DESCRIPTION ................................................................................................. 11 3. BASIC DEFINITIONS ........................................................................................................................... 12 3.1 Time .................................................................................................................................................. 12 3.2 Pseudo-Range ................................................................................................................................... 12 3.3 Phase ................................................................................................................................................. 12 Table 1: Observation Corrections for Receiver Clock Offset ............................................................. 13 3.4 Doppler ............................................................................................................................................. 13 3.5 Satellite numbers ............................................................................................................................... 13 4. THE EXCHANGE OF RINEX FILES ................................................................................................... 14 Figure 2: Recommended filename parameters. ................................................................................... 14 Table 2: Description of Filename Parameters ..................................................................................... 15 5. RINEX VERSION 3 FEATURES .......................................................................................................... 16 5.1 Observation codes ............................................................................................................................. 16 Table 3: Observation Code Components ............................................................................................ 16 Table 4 : RINEX Version 3.04 GPS Observation Codes .................................................................... 17 Table 5 : RINEX Version 3.04 GLONASS Observation Codes ......................................................... 18 Table 6 : RINEX Version 3.04 Galileo Observation Codes ............................................................... 19 Table 7 : RINEX Version 3.04 SBAS Observation Codes ................................................................. 19 Table 8 : RINEX Version 3.04 QZSS Observation Codes ................................................................. 20 Table 9 : RINEX Version 3.04 BDS Observation Codes ................................................................... 21 Table 10 : RINEX Version 3.04 IRNSS Observation Codes .............................................................. 22 5.2 Satellite system-dependent list of observables .................................................................................. 22 5.3 Marker type ....................................................................................................................................... 23 Table 11: Proposed Marker Type Keywords ...................................................................................... 23 5.4 Half-wavelength observations, half-cycle ambiguities ..................................................................... 24 5.5 Scale factor........................................................................................................................................ 24 5.6 Information about receivers on a vehicle .......................................................................................... 24 5.7 Signal strength .................................................................................................................................. 25 RINEX Version 3.04 ii Table 12: Standardized S/N Indicators ............................................................................................... 25 5.8 Date/time format in the PGM / RUN BY / DATE header record ..................................................... 25 5.9 Antenna phase center header record ................................................................................................. 26 5.10 Antenna orientation ......................................................................................................................... 26 5.11 Observation data records ................................................................................................................. 26 Table 13: Example Observation Type Records .................................................................................. 26 Table 14: Example Observation Data Records ................................................................................... 26 5.12 Ionosphere delay as pseudo-observables ........................................................................................ 27 Table 15: Ionosphere Pseudo-Observable Coding .............................................................................. 27 Table 16: Ionosphere Pseudo-Observable Corrections to Observations ............................................. 27 5.13 Channel numbers as pseudo-observables ........................................................................................ 27 5.14 Corrections of differential code biases (DCBs) .............................................................................. 28 5.15 Corrections of antenna phase center variations (PCVs) .................................................................. 28 5.16 Navigation message files ................................................................................................................ 28 Table 17: Example of Navigation File Satellite System and Number Definition Record .................. 28 Table 18: Example of Navigation File Header IONOSPHERIC CORR Record ................................ 28 6. ADDITIONAL HINTS AND TIPS ........................................................................................................ 29 6.1 Versions ............................................................................................................................................ 29 6.2 Leading blanks in CHARACTER fields ........................................................................................... 29 6.3 Variable-length records ..................................................................................................................... 29 6.4 Blank fields ....................................................................................................................................... 29 6.5 Order of the header records, order of data records............................................................................ 29 6.6 Missing items, duration of the validity of values .............................................................................. 30 6.7 Unknown / Undefined observation types and header records ........................................................... 30 6.8 Event flag records ............................................................................................................................. 30 6.9 Receiver clock offset ......................................................................................................................... 30 6.10 Two-digit years ............................................................................................................................... 30 6.11 Fit interval (GPS navigation message file) ..................................................................................... 31 6.12 Satellite health (GPS navigation message file) ............................................................................... 31 Table 19: Description of GPS Satellite Health Field .......................................................................... 31 6.13 Transmission time of message (GPS navigation message file)....................................................... 31 6.14 Antenna references, phase centers .................................................................................................. 31 RINEX 3.04.IGS.RTCM.doc 2018-11-23 RINEX Version 3.04 iii 7. RINEX UNDER ANTISPOOFING (AS) ............................................................................................... 32 8. DEALING WITH DIFFERENT SATELLITE SYSTEMS .................................................................... 33 8.1 Time system identifier ...................................................................................................................... 33 Table 20: Relationship between GPS, QZSS, IRN, GST, GAL, BDS and RINEX Week Numbers .. 34 Table 21: Constellation Time Relationships ......................................................................................
Recommended publications
  • MSM Feb2020 Review2
    SATCOM for Net-Centric Warfare MilsatMagazineFebruary 2020 issue This issue... SMC: Year of Success Kratos: Countering Threats from Space Maxar: Leveraging Commercial Innovation WTA: Hacking the Hacker Dispatches United States Space Command Kratos Defense L3Harris Get SAT 2nd SOPS Orbit Communications Comtech EF Data Maxar Technologies Booz Allen Hamilton Raytheon Schriever AFB Cover image is courtesy of Kratos Defense and Security Cover SNIPE Ad Publishing Operations Features Silvano Payne, Publisher + Executive Writer Dispatches Simon Payne, Chief Technical Officer Hartley G. Lesser, Editorial Director United States Space Command .................................................................................4 Pattie Lesser, Executive Editor Kratos Defense & Security Solutions .........................................................................6 Donald McGee, Production Manager Andy Bernard, Sales Director L3Harris................................................................................................................7 + 9 Teresa Sanderson, Operations Director Get SAT .....................................................................................................................8 Sean Payne, Business Development Director Space & Missile Systems Center...............................................................................10 Dan Makinster, Technical Advisor 2nd SOPS .................................................................................................................11 Wendy Lewis, Contributing Editor
    [Show full text]
  • (GNSS) Based Augmentation System Low Latitude Threat Model
    Effects Of Southern Hemisphere Ionospheric Activity On Global Navigation Satellite Systems (GNSS) Based Augmentation System Low Latitude Threat Model December 2014 Submitted to: Servicos de Defesa e Technologia de Processos (SDTP) And The U.S. Trade and Development Agency 1000 Wilson Boulevard, Suite 1600, Arlington, VA 22209-3901 Submitted by Mirus Technology LLC Prepared by the Mirus Technology, LLC (with Contributions from FAA, Stanford University, INPE, ICEA, Boston College, NAVTEC, and KAIST) Principal Investigator: Dr. Navin Mathur Executive Summary Ground-based Augmentation System (GBAS) augments the Global Positioning System (GPS) by increasing the accuracy to an appropriately equipped user. In addition to enhancing the accuracy of GPS derived accuracy, a GBAS provides the necessary integrity of accuracy (to a level defined by International Civil Aviation Organization, ICAO) required for a system that supports landing of an aircraft at an airport where GBAS is available. In addition, a GBAS system is designed to ensure the process of integrity and required continuity of GBAS operations and associated operational availability. The integrity of GBAS is threatened by several internal or external factors that can be broadly classified into three categories namely; Space Vehicle (SV) induced errors, environmental induced errors, and internally generated errors. Over the last decade, the US Federal Aviation Administration (FAA) has systematically defined, classified, characterized, and addressed each of the error sources in those categories that apply within CONUS. These efforts culminated in approval of several GBAS Category-I approaches within CONUS at various locations (such as Newark, Houston, etc.). Through the process of GBAS development for CONUS, the aviation and scientific communities realized that the Ionosphere is one of the key contributors to GBAS integrity threat.
    [Show full text]
  • ONSITE PROGRAM July 8–11, 2019 Tutorials: July 8 Show Dates: July 9–10 Hyatt Regency, Long Beach, California Classified Session: July 11, the Aerospace Corporation
    JOINT NAVIGATION CONFERENCE 2019 Positioning, Navigation and Timing Technologies: The Foundation for Military Ops and Homeland Security ONSITE PROGRAM July 8–11, 2019 Tutorials: July 8 Show Dates: July 9–10 Hyatt Regency, Long Beach, California Classified Session: July 11, The Aerospace Corporation Sponsored by the Military Division of the Institute of Navigation www.ion.org/jncwww.ion.org/jnc Technical Program Overview Track A: Beacon A Track B: Shoreline Ballroom Track C: Seaview Ballroom Track D: Beacon B TRACK AND CHAIR: David Wolfe Dr. David Chapman Elliott Kaplan Dr. Greg Reynolds USCG NAVCEN AFRL Space Vehicles Directorate The MITRE Corporation US Army MONDAY, JULY 8: TUTORIALS Advanced Celestial Navigation Systems 10:30 a.m. - 12:00 p.m. Precise Timekeeping and Applications DOD PNT Architecture (PNTA) Standard GPS 101 for Warfighter Platforms Lunch is on Your Own: 12:00 p.m. - 1:30 p.m. An Introduction to Cryptography with 1:30 p.m. - 3:00 p.m. GPS Resilience for the Warfighter DOD PNT Architecture (PNTA) Standard PNT Gaps for Autonomous Applications Attention to Navigation Break: 3:00 p.m. - 3:30 p.m. D1: Multi-GNSS Receivers for Military 3:30 p.m. – 5:00 p.m. A1: Autonomous Systems and PNT B1: PNT Requirements and Solutions C1: GPS Modernization Applications TUESDAY, JULY 9: FOUO SESSIONS A2: Complementary PNT 1: Naturally 8:30 a.m. – 10:00 a.m. B2: Modeling and Simulation 1 C2: Military GPS User Equipment 1 D2: Inertial Measurement Unit (IMU) 1 Occurring Measurement Sources Break in Exhibit Hall: 10:00 a.m.
    [Show full text]
  • Nov 2019 Advisory Board Minutes
    NATIONAL SPACE-BASED POSITIONING, NAVIGATION, AND TIMING ADVISORY BOARD Twenty-Fourth Meeting November 20-21, 2019 November 20-21, 2019 Hilton Oceanfront Cocoa Beach, Florida ADM (Ret. USCG) Thad Allen, Chair Mr. James J. Miller, Executive Director (page intentionally left blank) 2 Agenda (https://www.gps.gov/governance/advisory/meetings/2019-11/) WEDNESDAY, NOVEMBER 20, 2019 8:30 - 8:35 BOARD CONVENES Call to Order, Logistics, & Announcements Mr. James J. Miller, Executive Director, National Space-Based PNT Advisory Board, NASA Headquarters 8:35 - 9:30 Welcome & Kick-Off of 24th PNTAB Meeting Priorities & Proposed Topic Focus Areas Concise Roundtable Discussion VIEW PDF (3 MB) ADM Thad Allen, Chair; Hon. John Stenbit, Deputy Chair; Dr. Bradford Parkinson, 1st Vice- Chair; Governor Jim Geringer, 2nd Vice-Chair 9:30 - 9:45 National Coordination Office (NCO) for Space-based Positioning, Navigation, and Timing (PNT) PNT Policy Activity Update VIEW PDF (554 KB) Mr. Harold 'Stormy' Martin, Director, National Coordination Office for Space-Based PNT 9:45 - 10:00 Update on Air Force Space Command Reorganization Activities Role of GPS Integration Office VIEW PDF (992 KB) Lt Gen David Thompson, Vice-Commander, Air Force Space Command 10:00 - 10:30 GPS Program Status & Modernization Milestones IIIF, OCX, & Emerging Capabilities for Users VIEW PDF (1 MB) Lt Col Ken McDougall, Chief, GPS Integration Branch, GPS Integration Office, Space and Missile Systems Center (SMC) 10:30 - 10:45 BREAK 10:45 - 11:10 U.S. Dept. of Transportation (DOT) Developments on PNT Resiliency VIEW PDF (2 MB) Dr. Andrew Hansen, DOT Liaison to the GPS Program Office 11:10 - 11:35 3 DHS S&T PNT Program and Conformance Framework Science & Technology Directorate (S&T) Update VIEW PDF (630 KB) Mr.
    [Show full text]
  • Multi-GNSS Working Group Technical Report 2018
    Multi-GNSS Working Group Technical Report 2018 P. Steigenberger1, O. Montenbruck1 1 Deutsches Zentrum für Luft- und Raumfahrt (DLR) German Space Operations Center (GSOC) Münchener Straße 20 82234 Weßling, Germany E-mail: [email protected] 1 Introduction The Multi-GNSS Working Group (MGWG) is coordinating the activities of the Multi- GNSS Pilot Project (MGEX). MGEX is providing multi-GNSS products focusing on the global systems Galileo and BeiDou as well as the regional QZSS and IRNSS (NavIC). A few changes of membership of the MGWG occurred during the reporting period: Lars Prange succeeded Rolf Dach as representative of CODE • Shuli Song joined the MGWG representing SHAO • Sebastian Strasser of TU Graz joined the working group • Ahmed ElMowafy, Heinz Habrich, and Rene Warnant left the working group • 2 GNSS Evolution The numerous 2018 satellite launches of the four global systems GPS, GLONASS, Galileo, and BeiDou as well as the regional IRNSS are listed in Table1. Altogether 16 BeiDou-3 medium Earth orbit (MEO) satellites and one BeiDou-3 geostationary Earth orbit (GEO) satellite have been launched. The Interface Control Document (ICD) for the BeiDou open service signal B3I transmitted by BeiDou-2 and BeiDou-3 satellites has been published in February 2018 (CSNO, 2018). Based on a constellation of 18 BeiDou-3 MEO satellites, global services were declared on 27 December 2018. The Galileo quadruple launch in July 2018 completed the nominal Galileo constella- tion paving the road for full operational capability with now 26 satellites in orbit. Two 191 Multi–GNSS Working Group Table 1: GNSS satellite launches in 2018.
    [Show full text]
  • History of the GPS Program the Global Positioning System
    History of the GPS Program The Global Positioning System (GPS) is the principal component and the only fully operational element of the Global Navigation Satellite System (GNSS). The history of the GPS program pre-dates the space age. In 1951, Dr. Ivan Getting designed a three-dimensional, position-finding system based on time difference of arrival of radio signals. Shortly after the launch of Sputnik scientists confirmed that Doppler distortion could be used to calculate ephemerides, and, conversely, if a satellites position were know, the position of a receiver on earth could be determined. Within two years of the launch of Sputnik the first of five low-altitude “Transit” satellites for global navigation was launched. In 1967, the first of three “Timation” satellites demonstrated that highly accurate clocks could be carried in space. In parallel with these efforts, the 621B program was developing many of the characteristics of today’s GPS system. In 1973 these parallel efforts were brought together into the NAVSTAR-Global Positioning System, managed by a joint program office headed by then-colonel Dr. Brad Parkinson at the United States Air Force Space and Missile Systems Organization. This office developed the GPS architecture and initiated the development of the first satellites, the worldwide control segment and ten types of user equipment. Today, it continues to sustain the system as the Global Positioning System Directorate of the Space and Missile Systems Center. All performance parameters for the system were verified during ground testing by 1978. Ten development satellites were launched successfully between 1978 and 1985 and the initial ground segment that would provide the critical uploads to the satellites was also developed.
    [Show full text]
  • Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test
    electronics Technical Note Dynamic Performance Evaluation of Various GNSS Receivers and Positioning Modes with Only One Flight Test Cheolsoon Lim 1, Hyojung Yoon 1, Am Cho 2, Chang-Sun Yoo 2 and Byungwoon Park 1,* 1 School of Aerospace Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea; [email protected] (C.L.); [email protected] (H.Y.) 2 Future Aircraft Research Division, Korea Aerospace Research Institute, Daejeon 34133, Korea; [email protected] (A.C.); [email protected] (C.-S.Y.) * Correspondence: [email protected]; Tel.: +82-02-3408-4385 Received: 20 November 2019; Accepted: 7 December 2019; Published: 11 December 2019 Abstract: The performance of global navigation satellite system (GNSS) receivers in dynamic modes is mostly assessed using results obtained from independent maneuvering of vehicles along similar trajectories at different times due to limitations of receivers, payload, space, and power of moving vehicles. However, such assessments do not ensure valid evaluation because the same GNSS signal environment cannot be ensured in a different test session irrespective of how accurately it mimics the original session. In this study, we propose a valid methodology that can evaluate the dynamic performance of multiple GNSS receivers in various positioning modes with only one dynamic test. We used the record-and-replay function of RACELOGIC’s LabSat3 Wideband and developed a software that can log and re-broadcast Radio Technical Commission for Maritime Services (RTCM) messages for the augmented systems. A preliminary static test and a drone test were performed to verify proper operation of the system.
    [Show full text]
  • Of 6 UNAVCO Geodetic Data Services Plan for GNSS Modernization
    UNAVCO Geodetic Data Services Plan for GNSS Modernization: Data Formats and Preprocessing Tools March 2016 Modernization of GNSS New GPS signals (L2C, L5) and additional GNSS constellations (Galileo, GLONASS, Beidou/Compass, QZSS, SBAS, IRNSS) are changing the landscape For UNAVCO’s data handling moving into the future. The transition to utilizing GNSS within the global geodesy community and the UNAVCO community is in its very early stages. However, the need to move ahead has been recognized: The PBO Futures workshop Final report includes recommendations that UNAVCO: “Move to GNSS by 2018 to maintain relevancy oF network.” and “Upgrade a limited number oF GPS stations to Full GNSS in strategic target areas oF high scientific value, those that support large user communities, and For collection oF data For UNAVCO and community-driven development and testing eFForts.” UNAVCO’s Geodetic Data Services (GDS) division must prepare to manage, archive, and deliver this data. In addition, a model For Future support for GNSS data preprocessing tools used by UNAVCO Archive operations and provided to the global community needs to be Formulated. The challenges that face GDS in this transition, and our proposed response are the subject oF this white paper. Current and Emerging Formats RINEX 2.11 The current standard Format recognized and disseminated by the International GNSS Service (IGS) is RINEX version 2.11. UNAVCO archives several hundred gigabytes oF GPS level 0/1 standard rate (15 s or 30 s sample interval) data per month and delivers approximately Five times that to data processors via anonymous ftp. Data are archived in a variety of receiver-speciFic raw Formats, plus BINEX, RINEX 1, and RINEX 2.
    [Show full text]
  • A TSB Business Support Solution Delivered Through the Technology Programme
    A TSB business Support Solution Delivered through the Technology Programme 1 Where to now with GNSS? A TSB business Support Solution Delivered through the Technology Programme Peter Lancaster Technology Translator Location & Timing KTN What is the Location & Timing KTN? Knowledge Transfer Networks are funded by the UK government, through the Technology Strategy Board. Our role is to stimulate innovation through knowledge transfer. Between industry, universities, researchers etc. Primarily within the UK, but also increasingly with Europe and worldwide. Our specific focus is on technologies and applications that identify or use location, and timing. 2 What’s up there now? A TSB business Support Solution Delivered through the Technology Programme • GPS – 31 operational, plus 1 launched last month. 7 x Block IIR-M have L2C & L1M, L2M Lockheed Martin Global Positioning Satellite IIRM Artist Impression Lockheed Martin Global Positioning Satellite IIRM 3 A TSB business Support Solution Delivered through the Technology Programme http://en.wikipedia.org/wiki/File:ConstellationGPS.gif 4 What’s up there now? A TSB business Support Solution Delivered through the Technology Programme • GLONASS – 20 operational, incl 3 launched on Christmas Day 2008, 6 have a predicted life of less than 1 year. FDMA signals. • Beidou-1 – Geo-stationary, 2-way communication method – so limited users & accuracy. 3 operational, (2 needed to cover SE Asia). – Compass-M1 launched Apr 07 Picture: NPO PM to secure frequencies, G2 launched 15 th Apr 2009 Glonass-M (Uragan-M) Glonass is the Russian system. Currently undergoing an programme to replace and update the constellation. Currently 20 satellites operational, but several have a short predicted life span (2 are due to go out of service about now).
    [Show full text]
  • Signal Analysis of the First GPS III Satellite
    1 This is a post-peer-review, pre-copyedit version of an article published in GPS Solutions. The final 2 authenticated version is available online at: https://doi.org/10.1007/s10291-019-0882-7. 3 4 Signal analysis of the first GPS III satellite 5 Steffen Thoelert1), Peter Steigenberger2), Oliver Montenbruck2), Michael Meurer1) 6 1) Deutsches Zentrum für Luft- und Raumfahrt, Institute of Communications and Navigation, 82234 Wessling, 7 Germany 8 2) Deutsches Zentrum für Luft- und Raumfahrt, German Space Operations Center, 82234 Wessling, Germany 9 10 Steffen Thoelert, [email protected], ORCID 0000-0003-4653-318X 11 Peter Steigenberger, [email protected], ORCID 0000-0003-1905-6699 12 Oliver Montenbruck, [email protected], ORCID 0000-0003-4783-745X 13 Michael Meurer, [email protected], ORCID 0000-0001-7465-6705 14 15 Abstract 16 The signal-in-space of the first GPS Block III spacecraft is analyzed based on radio-frequency measurements 17 collected with a 30 m high-gain dish antenna as well as data from geodetic GPS receivers. The spectral properties 18 and modulation characteristics are discussed with focus on the L1 band, which employs a novel interlaced majority 19 voting technique for combination of the C/A, P(Y), and L1C data+pilot signal components. Compared to the 20 preceding generation of Block IIF satellites, a modified shaping of the L1 transmit antenna gain pattern is found, 21 which results in lower carrier-to-noise density ratios at mid to high elevations. Along with this, use of a separate 22 transmission chain for the military M-code signal is evidenced through the analysis of in-phase/quadrature signal 23 components and the derived transmit antenna gain variations.
    [Show full text]
  • Space Security 2010
    SPACE SECURITY 2010 spacesecurity.org SPACE 2010SECURITY SPACESECURITY.ORG iii Library and Archives Canada Cataloguing in Publications Data Space Security 2010 ISBN : 978-1-895722-78-9 © 2010 SPACESECURITY.ORG Edited by Cesar Jaramillo Design and layout: Creative Services, University of Waterloo, Waterloo, Ontario, Canada Cover image: Artist rendition of the February 2009 satellite collision between Cosmos 2251 and Iridium 33. Artwork courtesy of Phil Smith. Printed in Canada Printer: Pandora Press, Kitchener, Ontario First published August 2010 Please direct inquires to: Cesar Jaramillo Project Ploughshares 57 Erb Street West Waterloo, Ontario N2L 6C2 Canada Telephone: 519-888-6541, ext. 708 Fax: 519-888-0018 Email: [email protected] iv Governance Group Cesar Jaramillo Managing Editor, Project Ploughshares Phillip Baines Department of Foreign Affairs and International Trade, Canada Dr. Ram Jakhu Institute of Air and Space Law, McGill University John Siebert Project Ploughshares Dr. Jennifer Simons The Simons Foundation Dr. Ray Williamson Secure World Foundation Advisory Board Hon. Philip E. Coyle III Center for Defense Information Richard DalBello Intelsat General Corporation Theresa Hitchens United Nations Institute for Disarmament Research Dr. John Logsdon The George Washington University (Prof. emeritus) Dr. Lucy Stojak HEC Montréal/International Space University v Table of Contents TABLE OF CONTENTS PAGE 1 Acronyms PAGE 7 Introduction PAGE 11 Acknowledgements PAGE 13 Executive Summary PAGE 29 Chapter 1 – The Space Environment:
    [Show full text]
  • GPS and Galileo Friendly Foes? Brig Gen Kenneth Newton Walker Kenneth Walker Enlisted at Denver, Colorado, on 15 December 1917
    GPS and Galileo Friendly Foes? Brig Gen Kenneth Newton Walker Kenneth Walker enlisted at Denver, Colorado, on 15 December 1917. He took flying training at Mather Field, California, getting his com- mission and wings in November 1918. After a tour in the Philippines, he returned to Langley Field, Virginia, in February 1925 with a subsequent assignment in December 1928 to attend the Air Corps Tactical School. Retained on the faculty as a bombardment in- structor, Walker became the epitome of the strategic thinkers at the school and coined the revolutionary airpower “creed of the bomber”: “A well-planned, well-organized and well-flown air force attack will constitute an offensive that cannot be stopped.” Following attendance at the Command and General Staff School at Fort Leavenworth, Kansas, in 1933 and promotion to major, he served for three years at Hamilton Field, California, and another three years at Luke Field, Ford Island, and Wheeler Field, Hawaii. Walker returned to the United States in January 1941 as assistant chief of the Plans Division for the chief of the Air Corps in Washington, DC. He was promoted to lieutenant colonel in July 1941 and colonel in March 1942. During this time, when he worked in the Operations Division of the War Department General Staff, he coauthored the air-campaign strategy known as Air War Plans Division—Plan 1, the plan for organizing, equipping, deploying, and employing the Army Air Forces to defeat Germany and Japan should the United States become embroiled in war. The authors completed this monumental undertaking in less than one month, just before Japan at- tacked Pearl Harbor—and the United States was, in fact, at war.
    [Show full text]