MightySat-2.1
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| Mission type | Technology |
|---|---|
| Operator | AFRL |
| COSPAR ID | 2000-042A |
| Mission duration | 2 years, 4 months |
| Spacecraft properties | |
| Manufacturer | Orbital ATK |
| Launch mass | 130 kilograms (290 lb) |
| Power | 330 watts |
| Start of mission | |
| Launch date | July 19, 2000 |
| Rocket | Minotaur I |
| Launch site | Vandenberg SLC-8 |
| Contractor | Orbital Sciences |
| End of mission | |
| Decay date | 12 November 2002 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Eccentricity | 0.0026639786 |
| Perigee | 548.0 kilometers (340.5 mi) |
| Apogee | 585.0 kilometers (363.5 mi) |
| Inclination | 97.8& degrees |
| Period | 96.0 minutes |
| Instruments | |
| Fourier Transform Hyperspectral Imager | |
MightySat-2.1,[1] also known as P99-1 or Sindri was a small spacecraft developed by the Air Force Research Laboratory[2] to test advanced technologies in imaging, communications, and spacecraft bus components in space.
Contents
Design
MightySat II.1 was manufactured by Orbital ATK in a modular approach, using, e.g., VME-based subsystems, and a planar payload deck for small experimental payloads. The satellite measured 0.67m x 0.83m x 0.86m (WxLxH) and had a launch weight of 123.7 kg (Bus Mass: 87.1 kg). Power was provied by 2-axis articulated Si solar arrays with a designed end-of-life power output of 330 W. The Attitude Determination and Control Subsystem featured a 3-axis zero-momentum-bias reaction wheel assembly with a Sun sensor, a star tracker and inertial measurement units, delivering an attitude jitter of 15.7 arcsec/sec, and poiting accuracy and knowledge of 648 and 540 arcsec, respectively. The communication was compatible with the US Air Force Space-Ground Link System with data rates of 1 Mbit/s for payload/experiments data downlink, 2.0 kbit/s for Command uplink, and 20 kbit/s for Telemetry downlink. Computing and data handling was done by a RAD6000 CPU @ 20 MIPS with an IEEE VME backplane 128 MByte CPU RAM, and a 21.6 MBytes/sec transfer rate, and a 2 Gbit Solid State Recorder for Science Data. Among its 10 experiments was a Fourier Transform Hyperspectral Imager.[3]
Mission
MightSat II.1 was launched on July 19, 2000 with a Minotaur I. It deorbited in November 2002 due to natural decay of its orbit, exceeding more than twice its nominal lifetime.[3]
Payload and experimental instruments[3]
Stand-Alone Experiments/Sensors
- Kestrel Fourier Transform (Visible) Hyperspectral Imager
- Quad TMS320C40 (QC40) Floating Point Digital Signal Processor
- DARPA-Aerospace sponsored PicoSat Launcher Assembly
- Shape Memory Alloy Thermoelastic Tailoring Experiment
- Starfire optical reflectors for use with Kirtland’s Starfire Optical Range
Engineering/Experimental Bus Components
- The NRL miniature SGLS Transponder (known as the NSX)
- The Multi-functional Composite Bus Structure
- Solar Array Concentrator
- Advanced Composite Solar Array Substrate
- Solar Array Flexible Interconnect
