Capella Space is a private commercial company origin from USA and plans to launch 36 SAR satellites in total in the next 3-4 years time from 2020.
As is known, optical satellites have two important restrictive factors: Light and weather conditions. Cloud cover and no light mean that only 25% of the Earth surface can be captured at any time by optical imaging. Capella SAR (Artificial Aperture Radar) satellites are able to capture in X-band without being affected by clouds and no light factors.
Each Capella satellite has a three-year design life. By launching 12 satellites a year, the team will continue its satellite viewing capability indefinitely. Capella will be able to apply improvements in constellation and radar performance quarterly, with the feature of constantly updating and renewing satellite technology. System features for the first satellites are listed in Table 1.
IMAGING MODES:
|
Very High Resolution SPOT |
Very High Resolution SITE |
Very High Resolution STRIP |
Collection Mode |
Staring Spotlight |
Sliding Spotlight |
Strip Map |
Single Look Complex Resolution |
R=0.3m A=0.5m |
R=0.5m A=0.5m |
R=1.0m A=1.7m |
Ground Range Resolution |
0.5m |
1.0m |
2.0m |
Width |
5 km |
5 km |
5 km |
Length |
5 km |
10 km – 100 km |
20 km – 1000 km |
X Band Single Polarimetry (HH or VV) SAR |
FREQUENT GLOBAL UPDATES:
USAGE AREAS:
IMAGE MODE COVERAGE SIZES:
For more information:
TECHNICAL SPECIFICATIONS:
Frequency |
9.4 – 9.9 GHz (X-Band) |
Ouput Power |
600 W @ 20% duty cycle |
Waveform |
Linear FM Chirp |
PRF |
Greater than 5 kHz |
Imaging Bandwidth |
Up to 500 MHz |
Polarizations |
Single Pol VV or HH |
Typical Resolutions (GRD) |
0.6 m – 3 m+ |
NESZ (at mid-swath) |
-15 dB @ 0.5 m & 40 deg. incidence |
Acquisition Direction |
Left and right sides |
Imaging Modes |
Stripmap, multi-swath stripmap, spotlight, sliding spotlight, multi-look spotlight |
On-Board Storage |
6 TB Non-Volatile Payload Data Storage |
On-Board Processor |
NVIDIA GPU used for “quick-look” SAR processing |
Payload Antenna |
48 dB gain / 8 m^2 class |