Corporation EarthWatch EarthWatch Orbital Sciences Space Imaging GDE
"System" "EarlyBird" "QuickBird" "OrbView-1"
Altitude (km) 475 470 460 680 743
Inclination (deg) 073° 52° 97.25? 98.1? 98.8?
sun synchronous sun synchronous sun synchronous | sun synchronous | sun synchronous
Repeat Cycle 20 day (max) 20 day (max) 16 day (max) 14 day (max) 16 day
Revisits Cycle 1.5-2.5 da (max) 1.5-2.5 day(max) « 3 day (max) 1-3 day (max) 1-3 day (max)
Period (rev/da) 16 15.3 15.5 14.6 14.4
Table 6. High Resolution Commercial Earth Observing Satellites
- Orbit Information -
Corporation EarthWatch Earth Watch Orbital Sciences Space Imaging GDE
"System" "EarlyBird" "QuickBird" "OrbView-1"
Scenes (max) 500/orbit 100/orbit 535/day process 600/day 580/day
On board recording | 500 scenes 100 scenes 250 scenes, 32Gb | 64 Gb 60 Gb
Delivery time from 15 min.- 48 hr. | 15 min.- 48 hr. | 15 min.- 24 hr. 24 hr.- 48 hr. 24 hr.- 48 hr.
Acquisition to User
Ground Station Colorado, Alaska, + Regional Denver, Alaska, Japan | Regional
Sites Europe, Asia Regional Affiliates Affiliates + Regional Affiliates Affiliates
Table 7. High Resolution Commercial Earth Observing Satellites
- Communications/Processing Information -
Partners On-Orbit Date | Imager Type Payload Pixels
Agrium US Late 1998 "M10" Pushbroom 700 Kg 12 bit
Boeing Company 2 satellites ;
Farmland Industries
GDE Systems Early 1999
Pioneer Hi-Bred International 2 satellites
Institute of Technology Development (ITD)
| HH
GSD Spectral Swath FOV Stereo Pointing Sensor Sensor Accuracy
Bands Width Position Attitude
10m 45-52 205km 15.9° Yes +30° GPS Star Without GCP-
53-59 in-track in-track Trackers 30m
63-.69
.76-.90 & x40? With GCP-
cross-track 5m absolute
20m 1.55-1.68 cross-track 1m relative
100m+ | 1.23-1.53
TS
Altitude Inclination Revisits Cycle Constellation Phasing On-Board Recording
743 km
98.6° sun sync.
3.5 day @ nadir
0°, 77.14°, 180°, 257.14°
176 Gb each satellite
Table 8. Resource 21
- Commercial Earth Observing Satellite System -
280
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996
