result of such direction by NASA, Comsat may request the United States to enter into such litigation to protect the interests of the United States. In witness whereof, the parties hereto have executed this agreement as of July 5, 1966. I, Allen E. Throop, certify that I am the general counsel of the Communications Satellite Corp., a party to the foregoing agreement; that Mr. James McCormack, and Mr. Lewis C. Meyer, who signed the agreement on behalf of the corporation, were then chairman and chief executive officer, and director of procurement and contracting, of the corporation, respectively, and that the said agreement was duly signed for and on behalf of the corporation by authority of its governing body and is within the scope of its corporate powers. ALLEN E. THROOP, General Counsel, Communications Satellite Corp. AGREEMENT BETWEEN THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION AND COMMUNICATIONS SATELLITE CORP., FOR COMMUNICATIONS SERVICES APPENDIX A-DESCRIPTION OF COMSAT COMMUNICATIONS SERVICES FOR NCS/NASCOM 1. General description The services described will be carried by two U.S. interface centers, two U.S. earth stations, and two communications satellites capable of providing communications service between the United States and six remote stations. Simultaneous access to any two of four remote stations through a satellite above the Atlantic Ocean and to two stations through a satellite above the Pacific Ocean will be provided. The service will be for continuous use. Each U.S. interface will receive 12 voice circuits and 4 teletypewriter circuits at all times and Comsat will provide the coordination required to facilitate switching between the various remote stations. 2. Points of service A. Service will be provided, as hereinafter specified, from an Eastern U.S. communications satellite terminal at Andover, Maine, via an Atlantic satellite to the remote stations listed in subparagraphs (1), (2), and (3) below. (1) Two suitably equipped instrumentations ships located in the Atlantic and/or Indian Oceans between 37° N. latitude and 37° S. latitude, and between 60° E. and 70° W. longitude. (2) A Grand Canary Island station located at 15° W. longitude and 27° N. latitude. (3) An Ascension Island station located at 14° W. longitude and 8° S. latitude. Service will be provided simultaneously to any two of the above four stations. B. Service will be provided, as hereinafter specified, from a Western U.S. communications satellite terminal at Brewster Flats, Wash., via a Pacific satellite simultaneously to the remote stations listed in subparagraphs (1) and (2) below. (1) A Carnarvon, Australia, station located at 114° E. longitude and 25° S. latitude. (2) A suitably equipped instrumentation ship located in the Pacific Ocean between 37° N. latitude and 37° S. latitude and west of 120° W. longitude. C. The service shall be continuous with the exception of scheduled maintenance periods. D. NASA will keep Comsat advised as to the type of traffic (voice or data) to be carried by individual channels. 3. Services provided A. Total communications capacity to be provided will consists of 24 voice/data circuits and 8 teletypewriter circuits to remote earth stations. The technical characteristics of these circuits are described in tables I and II, appended hereto. The Eastern U.S. interface center will carry simultaneously to each of two remote stations, six voice/data circuits and two teletypewriter circuits. The Western U.S. interface center will carry simultaneously to each of two remote stations, six voice/data circuits and two teletypewriter circuits. Comsat will provide at the U.S. interface centers the equipment required to multiplex the individual channel signals into a broadband signal and to separate the broadband multiplexed signal into individual channels. Data modems, if required, will be furnished by NASA and will operate on the NASA side of the interface. B. As manager of the space segment, Comsat will provide the space segment network coordination required to assure proper satellite operating parameters for timely switching between remote stations. C. Arrangements will be made by Comsat for NASA to be accorded reasonable access free of charge to the Intelsat order-wire facilities associated with the satellite system concerned. 4. Definition of interface A. The domestic interfaces between Comsat and NASA shall be at the individual channel level in the 0 to 4000 c/s band and in conformance with the technical characteristics of the channels, as described in tables I and II. Two U.S. interfaces shall be established, one in the Eastern and one in the Western United States. NASA shall designate a domestic communications common carrier to participate in this interface and Comsat will arrange with the designated carrier to resolve technical details of such interfaces. B. The interfaces between Comsat and the earth terminals on the instrumentation ships shall actually take place at the antenna aperture aboard each ship. The interfaces between Comsat and the earth terminals at Grand Canary Island, Ascenion Island, and Carnarvon, shall actually take place at the microwave inputs and outputs of the satellite as viewed from the remote locations. However, in order to permit assessment of circuit performance, measurements may be made as if the interfaces existed at the individual channels at the output of the remote stations, as described in paragraph 5 below. 5. Performance evaluation Performance evaluation is based on a two-step process of system calculations and comparison measurements. A. System calculations.-The method of calculaton used to define system performance will be agreed upon by Comsat and NASA prior to launch. To the extent possible, this method will take into account anticipated signal loading and operating parameters. The earth station and shipborne station characteristics used for these calculations are given in tables III and IV, appended hereto. B. Comparison measurements.-Periodic measurements of circuit characteristics will be made at single channel level at the U.S. earth station output. The specific parameters to be measured are as follows: (1) Frequency response. (2) Noise levels. (3) Pilot tone levels. (4) Envelope delay. (5) Noise power ratio. (6) Delay distortion. (7) Impulse noise counting. These comparison measurements will form the basis for evaluation of performance trends. 6. Reliability Outage time is defined as that time for which the channel is rejected by NASA, but which is not part of scheduled maintenance periods. However, qualification of performance will be based on usability to NASA even though the performance may not meet the characteristics specified in tables I and II. The reliability objective for a single month is 99.8 percent. This reliability is measured according to the following: 7. Operational coordination and control A. Comsat will act as technical coordinator during the constructional phase of che system through the organizational mechanism established for this purpose— .e., the Earth Station Owners Working Committee for NASA communications services via Intelsat II. When the system becomes operational, operational coordination of communications satellite services will be in accordance with international common carrier practices, as appropriate. B. Operational control: Control and direction of earth station and communications satellite operation functions are the sole responsibility of Comsat and the cooperating earth station owners. In the case of shipborne earth stations, NASA agrees that such stations will respond to the communications operational instructions of Comsat control or its designated agent, insofar as its interface with the communication satellite is concerned, or as overall communication service performance is affected. Should ship locations or operating conditions aboard shipborne stations result in periods of actual performance below calculated performance, Comsat agrees only to take all reasonable operational measures with respect to the satellite communications system to provide a service performance which will permit the transmission of the required NASA traffic. Comsat will assist NASA in making adequate utilization of the communications satellite network through reasonable and appropriate operational control response and the furnishing of operational and technical advice and counsel. TABLE I. TECHNICAL CHARACTERISTICS OF VOICE/DATA CIRCUITS The characteristics of each voice-data circuit provided by Comsat at the interface with the common carriers are based on the type 4B schedule. The technical characteristics of the earth station to satellite to earth station link in clear weather will be as described below: Mode of Operation: Full Duplex Method of Termination : 4-Wire Impedance-Source and Load: 600 ohm-Resistive-Bal. Maximum Signal Power: -8dbmO for comp. data signal; -8 VU for voice Attenuation measured between 600 ohm impedence at lineup: 8 db ±1 db @ 1000 cps Expected max. var. of Net Loss: Short term ± 3 db Frequency response: Frequency range 300-499 500-2800 2801-3000 Envelope Delay: Loss Var. -db -2 to +6 -1 to +3 -2 to 6 Less than 500 microseconds 1000-2600 cps Less than 1500 microseconds 600-2600 cps Less than 3000 microseconds 500-2800 cps S/N (O dbm O test tone to Noise, weighted): 44 db Impulse Noise: 90 counts in 1⁄2 hour @ 68 dbrne O6A+VB TABLE II. TECHNICAL CHARACTERISTICS OF TELETYPEWRITER CIRCUITS The teletypewriter circuits shall be 100 word-per-minute, full duplex d.c. loops with frequencies and characteristics in conformance with good engineering practice. TABLE III. PRINCIPAL CHARACTERISTICS OF REMOTE EARTH STATIONS Communications Transmitter: a. Frequency Range: 6275 to 6425 MHz (Tunable over range for klystron). b. Emission: 126,000 F9. c. Power Output of Transmitter: 12,500 Watts, 41 dbW, maximum. Communications Transmitter-Continued d. Effective Radiated Power: 95 dbW-maximum. e. Frequency Tolerance: 1 part in 10° (crystal controlled). f. Radiation in Horizontal Plane: 15 dbW per 4 kHz maximum. Communications Antenna: a. Type: Cassegrain Antenna. b. Minimum operational elevation look angle: 5 degrees. c. Antenna Gain: 55.0 db at 6 GHz at transmitter output flange. d. Polarization: Linear with any orientation. Communications Receiver: a. Communications frequency range: 4045 to 4195 MHz. b. Gain (antenna): 51.7 db at 4 GHz at receiver input. c. Polarization: Linear with any orientation. d. Receiving System Noise Temperature: 100°K (above 5° elevation). Beacon Receiver Frequency: 4058 MHz 4182 MHz. TABLE IV. PRINCIPAL CHARACTERISTICS OF SHIPBORNE EARTH STATIONS Communications transmitter: a. Frequency Range: 6275 to 6425 MHz (Tunable over range for klystron). b. Power output of transmitter: 10,000 watts, 40 db W, nominal. c. Effective radiated power: 92 dbW, maximum. d. Polarization, transmit: Linear with any orientation. e. Azimuth of radiation: Dependent upon location. Communications Antenna: a. Type: Cassegrain antenna, fully steerable. b. Minimum operational elevation look angle: 5 degrees. c. Antenna gain, transmit: 52.7 db nominal at 6 GHz at transmitter output flange. d. Polarization, transmit: Linear with any orientation. e. Antenna gain, receive: 49.0 db nominal at 4 GHz at receive input. f. Polarization, receive: Linear with any orientation. Communications Receiver: a. Communications frequency range: 4045 to 4193 MHz. b. Receiving system noise temperature: 170° K at 5° elevation. c. Margin above threshold: 6.3 db. Beacon receiver: a. Frequencies: 4058.15 MHz 4182 MHz. Order wire: a. Receive frequency: 4090 MHz. APPENDIX 7.-DCA/COмSAT CONTRACT DOCUMENTS FOR 30 PACIFIC CODE CMSA CIRCUITS CONTRACT NO: DCA200 66 C 148 BASIC AGREEMENT COMMUNICATIONS FACILITIES AND SERVICES BETWEEN THE Preamble. INDEX OF CLAUSES 123456780 Definitions. Facilities and services to be furnished by the company. Access. Ordering of facilities and services. Payment. Rates, charges and services. 7 Obligation of funds. Amendment of contract. Termination. 9 20 Contract Work Hours Standards Act-Overtime Compensation. 21 Equal opportunity. 22 Patent indemnity. 23 Notice and assistance regarding patent and copyright infringement. 25 Small business. 26 Military security requirements. 27 Special construction and equipment charges. 28 Cancellation or termination of orders. 29 Authorization and consent. 30 Title to communications facilities and equipment. Signatories. Contract No. DCA200 66 C 148 BASIC AGREEMENT FOR COMMUNICATION FACILITIES AND SERVICES THIS CONTRACT, executed as of the 1st day of June 1966, by the United COMMUNICATIONS SATELLITE CORPORATION (Company) 1900 L Street, N.W., Washington, D.C. 20036 (Address) a corporation organized and existing under the laws of the State of---‒‒‒‒ Witnesseth: ARTICLE 1-DEFINITIONS a. The term "Department" means the Department of Defense and all agencies |