Umbra's satellite is designed for high-bandwidth, high-throughput imaging. This guide walks through the design specifications and explains how they relate to overall system performance.
Dimensions and Power
Umbra's satellite is lightweight, stows in a small form factor, and yet still manages to produce a large amount of power while deploying a large antenna to capture its radar return.
While stowed, the satellite can easily fit on an ESPA ring making it ideal for ridesharing missions and reducing the cost to launch significantly. But once fully deployed, its superior bandwidth, antenna size, and antenna efficiency enable industry-leading resolution while maintaining an excellent signal-to-noise ratio.
Radar Antenna Size: 10m² once fully deployed
Radar Bandwidth: 1,200 MHz
Radar Power: >500w peak power
Launch Volume: Sub-ESPA
Umbra's first satellite launched aboard the SpaceX Transporter-2 rideshare mission on June 30th, 2020.
Altitude: 450 - 600km
Inclination: 97.4 degrees (polar orbit)
Nominal Orbital Height: 560km
Ground Track Repeat: 2 weeks
Collection Capability & Revisit Rate
Umbra's satellites are extremely "agile," meaning they are not statically positioned to look perpendicular to the flight path but are capable of "squinting" forwards and backwards along the flight path for greater visibility. This agility, combined with the power generation and antenna characteristics of the satellite architecture, equate to a large collection volume per satellite.
Squint Angle: 45º to 135º
Grazing Angle: 20º to 70º
Look Direction: Left or Right
Polarization: HH or VV per collect
Ground Range: 170 - 1100km on either side of flight path
Polar Orbit Mean Revisit by Latitude (per satellite):
±0º to 30º | 9.25 Hr
±30º to ±50º | 7 Hr
±50º to 67º | 4.5 Hr
±67º to ±90º | 2 Hr