Copernicus Sentinel-1 satellites: sensitivity of antenna offset estimation to orbit and observation modelling

Peter, Heike; Fernández, Jaime; Féménias, Pierre

doi:https://doi.org/10.5194/adgeo-50-87-2020

Articles | Volume 50

https://doi.org/10.5194/adgeo-50-87-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/adgeo-50-87-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 50

27 Mar 2020

| 27 Mar 2020

Copernicus Sentinel-1 satellites: sensitivity of antenna offset estimation to orbit and observation modelling

Heike Peter, Jaime Fernández, and Pierre Féménias

Data sets

Sentinel-1 GNSS data ESA https://scihub.copernicus.eu

Documentation – POD, Sentinel Online ESA https://sentinel.esa.int/web/sentinel/missions/sentinel-1/ground-segment/pod/documentation

Short summary

The SAR Copernicus Sentinel-1 satellites require a high orbit accuracy of 5 cm in comparison to external processing facilities. Orbit analyses showed discrepancies between the results of the two Sentinel-1 satellites being identical in construction. Follow-up estimation of GPS antenna offsets shows the sensitivity to different orbit and observation models. Consistent results may be achieved for both satellites when applying estimated antenna offsets considering self-shadowing assumptions.