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MAESTRO
 | Stacksat P87-2 American technology satellite. The U. S. military's STACKSAT mission involved the launch of three similar spacecraft, POGS, TEX and SCE. Technology satellite built by DSI for DARPA, USA. Launched 1990. Used MAESTRO Bus. |
 | MACSAT American military communications satellite. Experimental communication (store and forward) satellite built by DSI for DARPA, USA. Launched 1990. Used MAESTRO Bus. |
1990 April 11 - . 15:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E Altair.
- USA 56 - .
Payload: POGS & SSR. Nation: USA.
Agency: USAF.
Class: Technology.
Type: Navigation technology satellite. Spacecraft Bus: MAESTRO.
Spacecraft: Stacksat P87-2.
USAF Sat Cat: 20560 . COSPAR: 1990-031A. Apogee: 745 km (462 mi). Perigee: 627 km (389 mi). Inclination: 89.80 deg. Period: 98.48 min.
Polar Orbiting Geomagnetic Survey satellite designed to measure the Earth's magnetic field vector as a function of position. Data from the experiment was used to improve Earth navigation systems, and was stored in an experimental solid state recorder. Six low cost ground stations were designed, built and located around the world to operate the spacecraft flown on this mission.
- USA 57 - . Payload: TEX. Nation: USA. Agency: USAF. Class: Technology. Type: Navigation technology satellite. Spacecraft Bus: MAESTRO. Spacecraft: Stacksat P87-2. USAF Sat Cat: 20561 . COSPAR: 1990-031B. Apogee: 742 km (461 mi). Perigee: 627 km (389 mi). Inclination: 89.80 deg. Period: 98.45 min. TEX (Transceiver EXperiment) carried a variable power transmitter used to study ionospheric effects on RF transmissions. Data from the experiment was used to determine minimum spacecraft transmitter power levels for transmission to ground receivers..
- USA 58 - . Payload: SCE. Nation: USA. Agency: USAF. Class: Technology. Type: Navigation technology satellite. Spacecraft Bus: MAESTRO. Spacecraft: Stacksat P87-2. USAF Sat Cat: 20562 . COSPAR: 1990-031C. Apogee: 741 km (460 mi). Perigee: 627 km (389 mi). Inclination: 89.80 deg. Period: 98.44 min. SCE (Selective Communications Experiment) carried a variable frequency transmitter to study ionospheric effects at various RF frequencies, and was also designed to demonstrate message store and forward techniques..
1990 May 9 - . 17:50 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC5. LV Family: Scout. Launch Vehicle: Scout G-1.
- Macsat 1; M-1 - . Payload: MacSat 1. Mass: 68 kg (149 lb). Nation: USA. Agency: DARPA. Class: Communications. Type: Military communications satellite. Spacecraft Bus: MAESTRO. Spacecraft: Macsat. USAF Sat Cat: 20607 . COSPAR: 1990-043A. Apogee: 753 km (467 mi). Perigee: 602 km (374 mi). Inclination: 89.90 deg. Period: 98.30 min. Multiple Access Communications Satellite; global store and forward communications. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B)..
- Macsat 2; M-2 - . Payload: MacSat 2. Mass: 68 kg (149 lb). Nation: USA. Agency: DARPA. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MAESTRO. Spacecraft: Macsat. USAF Sat Cat: 20608 . COSPAR: 1990-043B. Apogee: 749 km (465 mi). Perigee: 600 km (370 mi). Inclination: 89.90 deg. Period: 98.30 min. Multiple Access Communications Satellite; global store and forward communications. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B)..
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