Diadem-1C and -1D
Jump to: Mission Objectives, Mission Instrumentation, Mission Parameters, Additional Information
Mission Photos:
Courtesy of CNES
Mission Objectives:
Diadème-1 D1C and Diadème-2 D1D were launched by CNES, one week apart in February 1967 into elliptical orbits. Both Diadème satellites were geodetic missions. These satellites were magnetically stabilized which limited their trackability in the southern hemisphere.
Mission Instrumentation:
Diadème has the following instrumentation onboard:
- Dual frequency Doppler transmitters
- Retroreflector array
Mission Parameters:
| Diademe-C | Diademe-D | |
| Sponsor: | CNES (France) | CNES (France) |
| Expected Life: | decades | decades |
| Primary Application: | geodesy | geodesy |
| Primary SLR Application: | geodesy | geodesy |
| COSPAR ID: | 6701101 | 6701401 |
| SIC Code: | 6703 | 6704 |
| Satellite Catalog (NORAD) Number: | 2674 | 2680 |
| Launch Date: | February 08, 1967 | February 15, 1967 |
| RRA Diameter: | 50 cm | 50 cm |
| RRA Shape: | 2 flattened truncated cones | 2 flattened truncated cones |
| Reflectors: | 144 corner cubes | 144 corner cubes |
| Orbit: | Elliptical | Elliptical |
| Inclination: | 39.9 degrees | 39.5 degrees |
| Eccentricity: | 0.037 | 0.076 |
| Perigee: | 550 km | 570 km |
| Period: | 101 minutes | 108 minutes |
| Weight: | 23 kg | 23 kg |
