Spotlight: Capella satellites will be capable of staring-spotlight imaging, in which the beam is focused on a single point on the Earth throughout the acquisition.
Note that for most modes, the user can select the image size, and is able to trade resolution for imaging quality. The Capella satellites will be capable of imaging in several modes, including staring and sliding spotlight, traditional stripmap, and multi-swath stripmap.
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Hourly maximum revisit times will be achieved when the full constellation of 36 satellites is deployed in 2021 (Figure 1).įigure 2: Ground range resolution plotted as a function of transmit bandwidth and look angle (image credit: Capella Space) The average imaging revisit time will be between 3 and 6 hours, and the maximum revisit time will be 6 hours. The constellation will be launched in 2019 with the initial deployment of 6 satellites in two orbital planes. This constellation will enable delivery of products to meet specific user demands anywhere in the world. This year, Capella Space will launch two sub-50 kg satellites as the prelude to a constellation of 36 that will provide hourly revisit time. The radars will be single-polarization X-band systems, capable of operating over a 500 MHz bandwidth in stripmap and spotlight imaging modes. The Capella constellation will consist of 36 microsatellites, each one will operate at an altitude of around 500 km in an approximately 90-minute polar orbit, providing average imaging revisit times of less than one hour.
The Palo Alto California-based commercial startup company Capella Space, founded in 2016 by Payam Banazadeh and William Woods, is in the process of developing a constellation of X-SAR microsatellites to provide global coverage.
Capella X-SAR (Synthetic Aperture Radar) Constellation Sensor Complement Spacecraft Launch Mission Status References
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