GeoSTARe in a mission combining the continuous view capabilities with super-continental access of geostationary orbits with the all-day-all weather imaging capabilities of Synthetic Aperture Radar, leading to a novel and unique observation system with quasi-continuous revisit.
The well proven potentials of Radarin sensing roughness, deformations, and moisture makes of GeoSTARe a game changer in those fields, where hourly monitoring is a must – no other system can currently achieve GeoSTARe imaging capabilities.
A C band payload on a telecom satellite would generate 150 m resolution images after 30 minutes, and the 10 m full resolution image by integrating data during an ~8 hours long aperture synthesis.
The quasi-continuous imaging enables a raft of applications for security, services and science addressing meteorology, cryosphere, seismology, geo-hazards, floods, agriculture, structural monitoring, emergencies.
Example of applications:
soil moisture maps for Numerical Weather Forecast.
Measure rapidly developing surface events such as river floods, landslides, earthquake damage and lava flows.
with subdaily updates, from a regional size down to local scale.
Concept and performances
The system can be implemented in different concepts: single, multiple or flexible beamwidth, C or L+X band, hosted pyaload on telecommunication satellite or stand alone-ministatellite.
GeoSTARe can evolve into a swarm of mini-satellites with a gain in revisit and power proportional up to the square of the number of sensors. A two-satellite swarm would achieve image revisit of one hour with a single look resolution of 30 × 10 m. The constellation operation is shown in the animation: SAR-satellites 1 and 2 are marked by dark stars, the red dot is a virtual third SAR created by transmitting with sat 1 and receiving sith sat 2. The black segment is the synthetic aperture in 1 hour of orbit, the blue one is the total aperture.
GeoSTARe is under study by a international consortium of miore than forthy scientists, it will be proposed as next ESA Earth Explorer IX – http://explorercall.esa.int/index.php/15-mission-ee9
Ruiz Rodon, J.; Broquetas, A.; Monti Guarnieri, A.; Rocca, F., “Geosynchronous SAR Focusing With Atmospheric Phase Screen Retrieval and Compensation,” inGeoscience and Remote Sensing, IEEE Transactions on , vol.51, no.8, pp.4397-4404, Aug. 2013
Wadge, G.; Guarnieri, A.M.; Hobbs, S.E.; Schultz, D., “Potential atmospheric and terrestrial applications of a geosynchronous radar,” in Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International , vol., no., pp.946-949, 13-18 July 2014
SES – Contract report “Study on the Utilisation of Future Telecom Satellites for Earth Observation” ESA Estec contract no 4000108594/13/NL/CT. Version 1.1
A. Monti Guarnieri, O. Bombaci, T.F. Catalano, C. Germani, C. Koppel, F. Rocca, G. Wadge, ARGOS: A fractioned geosynchronous SAR, Acta Astronautica, Available online 2 December 2015, ISSN 0094-5765, http://dx.doi.org/10.1016/j.actaastro.2015.11.022.