OMB Approval No. 2700-0042 AMENDMENT OF SOLICITATION/ 1. CONTRACT ID CODE PAGE OF PAGES MODIFICATION OF CONTRACT NAS 9-98100 1 3 2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable) Contract Action 48 (CCO) See Block 16C N/A N/A 6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6) CODE NASA LYNDON B. JOHNSON SPACE CENTER Attn: Lawrence A. Kenyon, PCO, Mail Code: BN 2101 NASA Road One Houston, TX 77058 8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State, and ZIP Code)

LOCKHEED-MARTIN SPACE OPERATIONS COMPANY Attn: David F. Bruce, Manager of Contracts 501 Gemini Avenue Houston, TX 77058 CODE FACILITY CODE (x) 9A. AMENDMENT OF SOLICITATION NO. 9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO. 10B. DATED (SEE ITEM 13) X NAS 9-98100 Originally dated: 10/01/98 11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended. Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing Items 8 and 15, and copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offor submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified. 12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS, IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.(x) (x) A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE X CONTRACT ORDER NO. IN ITEM 10A. FAR 52.243-2, Alt. II (Apr 84) Changes B.FAar THEFA ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

d. OTHER (Specify type of modification and authority)

X E. IMPORTANT: Contractor X is not, Is required to sign this document and return copies to the issuing office. 14. description of amendment/modification (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

The following changes are made to the contract. This action results in a contract credit and contractor shall submit a credit proposal in response to this modification within 30 days.

See Pages 2-3.

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect. 15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print) Caroline Marrs Root, Contracting Officer 15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED BY Original signed by: Caroline Root 1-11-2000 (Signature of person authorized to sign) (Signature of Contracting Officer) NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (Rev. 10-83) PREVIOUS EDITION UNUSABLE JSC MS Word (Aug 95) Prescribed by GSA FAR (48 CFR) 53.243 Contract NAS9-98100 Contract Action 48 Page 2 of 3

1. Instrumentation Radar Support Program (IRSP) is removed as a CSOC responsibility in the following Integrated Tables.

Table B.2.A-3.0-B Tracking, Data Acquisition, and Command Data Services Customers and Services New CWBS No. (Refer to DRD 2.1.1-b) Service Customer Requirement 2.4.2._ Element 1 2 3 4 5 7.e 9.b 10.b 10.c 10.e CS030 DOD 45 SW/NASA GSFC Instrumentation Radar X Support Program (IRSP) Support Agree- ment

Table B.1.A-3.0-B Space Science and Earth-Observing Mission Services Customers and Services

New CWBS No. (Refer to DRD 2.1.1-b) Service Customer Requirement 2.4.1._ Element 1.a 1.b 2.a 2.b 3.a 3.b 4.a 4.b 5.a 5.b 6.a 6.b 7 8.b 8.d 9 CS030 USAF 45 S/WNASA GFSC Instrumentation Radar X X Support Program (IRSP) Support Agree- ment

Table B.1.D-3.0-B Checkout and Launch Support Mission Services Customers and Services New CWBS No. (Refer to DRD 2.1.1-b) Service Customer Requirement 2.4.1._ Element 2.a 7 8.d 9 CS030 USAF 45 S/WNASA GFSC Instrumentation Radar X Support Program (IRSP) Support Agree- ment Contract NAS9-98100 Contract Action 48 Page 3 of 3

Table B.1.E-3.0-B ELV Telemetry Lab Mission Services Customers and Services New CWBS No. (Refer to DRD 2.1.1-b) Service Customer Requirement 2.4.1._ Element 2.a 8.b 9 CS030 USAF 45 S/WNASA GFSC Instrumentation Radar X Support Program (IRSP) Support Agree- ment

Table B.3.A-3.0-B GSFC Center Unique Services Customers and Services New CWBS No. (refer to Volume II, Servic Customer Requirement Appendix A) e Unique Service Eleme 2.4.3.1.1 nt CSO30 DOD 45 S/WNASA GFSC Instrumentation Radar Support Program (IRSP) Support X Agreement, 45 SW No. 15E-1-17.

2. The following service element is added under Table B.2.A-4.0-A.

Table B.2.A-4.0-A Roles and Responsibilities for the SN/GN/WFF

New RFP Service CSOC Responsibilities GSFC Responsibilities Responsibilities of Other Notes Service Element Groups Element GE030 A.1.100 Provide data services. Directs IRSP activities at Instrumentation Radar Support IRSP requires Wallops Wallops Radar Wallops and maintains IRSP Program (IRSP) provides C- government entity to Suborbital Instrumentation support agreement. band tracking radar unique administer services. Data Services replacement parts for 7 radar Complex systems at Wallops. 3. All other terms and conditions of the contract remain unchanged.