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The Deep Space Network Committee on the Review of Progress Toward Implementing the Decadal Survey Vision & Voyages for Planetary Sciences Joseph Lazio L

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The Deep Space Network Committee on the Review of Progress Toward Implementing the Decadal Survey Vision & Voyages for Planetary Sciences Joseph Lazio L The Deep Space Network Committee on the Review of Progress toward Implementing the Decadal Survey Vision & Voyages for Planetary Sciences Joseph Lazio L. Benner, A. Bhanji, A. Biswas, W. Klipstein, S. Lichten, J. Statman, S. Townes © 2017 California Institute of Technology. Government sponsorship acknowledged. Deep Space Network Topics - Deep Space communications and navigation - Planetary radar - Future planning Canberra Goldstone Madrid2 Planetary Sciences-DSN Partnership Don’t Leave Earth Without Us! Voyager 1 Voyager 2 Dawn Cassini New Horizons Geotail Mars Odyssey Curiosity Opportunity MOM Mars Reconnaissance Mars TGO ARTEMIS OSIRIS REx XMM Cluster JUNO Akatsuki MAVEN Mars Express Orbiter Chandra MMS STEREO Wind DSCOVR Spitzer SOHO Kepler Hayabusa-2 ACE LRO Solar Probe Plus TESS JWST BepiColumbo InSight Mars 2020 Europa GSSR Planetary Sciences Vision 2050 3 Telemetry, Tracking, & Command: 5 Year Monthly Data, Averaged over All Missions DSN Network Data Delivery (Fiscal) 100%100.0% 99.5% 99%99.0% 98.5% 98.0% 97.5% • Telemetry • Command 97%97.0% NASA requirement: 95% • RadioMetric Typical DSN performance > 99% • Combined 96.5% 96.0% 2011 2012 2013 2014 2015 2016 2017 2011-05 2011-11 2012-05 2012-07 2013-01 2013-07 2014-01 2014-03 2014-09 2015-03 2015-09 2015-11 2016-05 2016-11 2017-05 2011-01 2011-03 2011-07 2011-09 2012-01 2012-03 2012-09 2012-11 2013-03 2013-05 2013-09 2013-11 2014-05 2014-07 2014-11 2015-01 2015-05 2015-07 2016-01 2016-03 2016-07 2016-09 2017-01 2017-03 Network Telemetry % Network Command % Network RadioMetric % Combined % Poly. (Combined %) DSN Status – Planetary Sciences Decadal Mid-Term 4 DSN and Planetary Science 2015: Pluto from New Horizons Credit: NASA/JHUAPL/SwR I 2014: Comet Siding Springs from MAVEN Credit: NASA/JPL- Caltech/University of Arizona 2016: Jupiter from Juno Credit: NASA/JPL- Caltech/SwRI/ 2017: Saturn MSSS/Betsy from Cassini Asher Hall/Gervasio Credit: NASA/JPL- Robles Caltech/Space Science Institute DSN Status – Planetary Sciences Decadal Mid-Term jpl.nasa.gov5 Planetary Radar The Primitive Bodies Earth-Based Telescopes The Arecibo and Goldstone radar telescopes are powerful, complementary facilities that can characterize the surface structure and three- dimensional shapes of the near-Earth objects within their reach of about one-tenth of the Earth-Sun distance. Arecibo has a sensitivity 20 times greater than Goldstone, but Goldstone has much greater sky coverage than Arecibo. Continued access to facilities for the detailed study of near-Earth objects is essential to primitive bodies studies. DSN Status – Planetary Sciences Decadal Mid-Term 6 National Radar Assets Goldstone DSS-14 (DSN) Arecibo (NAIC) 70 m antenna, 500 kW 300 m antenna, 1 MW transmitter, 4 cm transmitter, 13 cm wavelength (X band) wavelength (S band) Green Bank Telescope (GBO) 100 m antenna, no transmitter 7 Goldstone Solar System Radar DSS-14: 70 m antenna at Goldstone Deep Space Communications Complex DSN Status – Planetary Sciences Decadal Mid-Term 8 Goldstone Solar System Radar DSN Status – Planetary Sciences Decadal Mid-Term 9 Goldstone Solar System Radar New klystron! DSN Status – Planetary Sciences Decadal Mid-Term 10 Vision and Voyages for Planetary Science in the Decade 2013-2022 The Deep Space Network “The DSN is a critical element of NASA’s solar system exploration program. It is the only asset available for communications with missions to the outer solar system, and is heavily subscribed by inner solar system missions as well. As instruments advance and larger data streams are expected over the coming decade, this capability must keep pace with the needs of the mission portfolio. Future demands on the DSN will be substantial. Missions to the distant outer solar system requires access to either 70-meter antennas or equivalent arrays of smaller antennae. The DSN must also be able to receive data from more than one mission at one station simultaneously. If arrays can only mimic the ability of one 70-meter station and nothing more, missions would still be downlink constrained and would have to compete against one another for limited downlink resources. “Although Ka-band downlink has a clear capacity advantage, there is a need to maintain multiple band downlink capability. For example, three-band telemetry during outer planet atmospheric occultations allows sounding of different pressure depths within the atmosphere. In addition, S-band is required for communications from Venus during probe, balloon, lander, and orbit insertion operations where other bands cannot penetrate the atmosphere. X-band capability is required for communication through the atmosphere of Titan, and also for emergency spacecraft communications. The committee recommends that all three DSN complexes should maintain high power uplink capability in X and Ka-band, and downlink capability in S, Ka, and X-bands. NASA should expand DSN capacities to meet the navigation and communication requirements of missions recommended by this decadal survey, with adequate margins. DSN Status – Planetary Sciences Decadal Mid-Term 11 2020--2021 Mars Contention Period Planning New Mars missions launch in mid-2020 and arrive in early 2021 ~ 8-week window Current Mars Missions 2020--2021 New Mars Missions • TGO 2016 (orbiter) – operating with DSN Support • MAVEN (orbiter) – operating • NASA Mars 2020 (Rover) (EDL) • Curiosity (rover) – operating • ESA ExoMars Rover and • InSIGHT (lander) – operating Surface Platform (RSP) (EDL) • MRO (orbiter) – likely operating • SpaceX Red Dragon lander 1 • MOM-1 (orbiter) – likely operating (EDL) • MER (rover) – possibly operating • SpaceX Red Dragon lander 2 • ODY (orbiter) – possibly operating (EDL) • MEX (orbiter) – possibly operating? • ISRO MOM-2 orbiter (MOI) • UAE EMM orbiter (MOI) DSN Status – Planetary Sciences Decadal Mid-Term 12 2020--2021 Mars Contention Period Planning Preliminary Findings I Deep Space Network will be supporting unprecedented volume of missions and data at one planetary body DSN planning for Mars and 30+ non-Mars missions • Longer term impacts from Mars mission “surge” persists Does not “go away” later --- overall mission load increased Mitigating actions also long-term strategies: in 2020s--2030s, growth in planetary, crewed missions expected to continue … DSN Status – Planetary Sciences Decadal Mid-Term 13 DSN Futures Mitigation and Strategy I http://eyes.nasa.gov/dsn/dsn.html Maximize use of Multiple Spacecraft Per Aperture (MSPA) – up to four at once (downlink) – Investigating multiple uplink per aperture Likely requires changes to on- board radios DSN Status – Planetary Sciences Decadal Mid-Term 14 DSN Futures Mitigation and Strategy II DSN Aperture Enhancement Project – DSN identified efficiencies to enable construction of DSS-56 foundation additional 34 m antennas in Madrid – Provides multiple mission coverage at each Complex Addressing Decadal Survey recommendation Maximize use of non-DSN large antennas ESA, Sardinia, JAXA, ISRO, Morehead State DSN Status – Planetary Sciences Decadal Mid-Term 15 Deep Space Network DSN Aperture Enhancement Project (through 2025) + backend digital signal processing Canberra Goldstone Madrid 16 DSN Futures Mitigation and Strategy III Modify maintenance schedule to maximize DSN availability during critical periods (launches, Mars arrivals) Accelerate some antennas, defer others cf. change car’s oil before embarking on long road trip DSN Status – Planetary Sciences Decadal Mid-Term Figure from Space News, April 24, 2017 17 History of Downlink Performance 1012 Jupiter Discovery of 1st gravity assist to 1st close-up orbiter 1,000th planet 1010 visit multiple study of outer planets: Mercury planets and Venus 8 10 Saturn orbiter 1st flyby of Mars 106 1st US Spacecraft to fly by the Moon 4 Arrayband Band Band - 10 - Ka Ka Antenna Improved Improved 102 Spacecraft AntennaArraying 1 History to date: m - 13 Improved Coding Improved Performance has improved by 10 so far Antenna 10-2 64 Projection: Equivalent Data Rate from Jupiter from Rate Data Equivalent Demand will continue to increase 10× per decade -4 10 Maser Internet TV relayed 1st Mini 1st Cell IBM PC made 1st Hand-Held iPhone 10-6 by satellite Computer Phone Released Public GPS Receiver Released 1950 1960 1970 1980 1990 2000 2010 DSN Status – Planetary Sciences Decadal Mid-Term 18 DSN Future Technologies Solid-state power amplifiers for higher uplink rates New, software-defined radios, associated technologies Including for smallsats Next-generation clocks Standards for cross-agency support and interaction Quantum communications? DSN Status – Planetary Sciences Decadal Mid-Term 19 Decade 0--1: 10× Improvements over Today Vision for the DSN's Future Make upgrades to enhance future Mars orbiter relay capabilities … and other spacecraft – On-board software-defined radios • Universal Space Transponder (UST) • Iris smallsat transponder – On the ground Common Platform signal processor On board and Universal Space Transponder new digital ground Ka band (UST) backends DSN Status – Planetary Sciences Decadal Mid-Term 20 Decade 2+: 100× Improvements over Today Deep Space Optical Communications (DSOC) to be demonstrated!Vision for the DSN's Future DSN Status – Planetary Sciences Decadal Mid-Term 21 Decade 2+: 100× Improvement over Today Vision for the DSN's Future Dedicated Comm Relays Extend the Internet to Mars, enabling public Human and robotic users engagement 100× today’s data rates from Mars – up to 1 Gbps Dedicated 12m z Stations NASA + International partnerships Hybrid RF/Optical Antenna High Performance
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