The Copernicus Precise Orbit Determination (CPOD) Service is pleased to announce the upcoming operational Short Time Critical (STC) orbit product for the Sentinel‑1 mission, known as AUX_MOEORB, which will be available starting on 22nd April 2025. This new product, once officially released, will complement the existing portfolio of Predicted (AUX_PREORB), Restituted (AUX_RESORB), and Precise Orbit Ephemerides (AUX_POEORB) orbit file solutions currently offered by the CPOD Service. The product will be available both for Sentinel-1A and Sentinel-1C missions.
The Copernicus Precise Orbit Determination (CPOD) Service is pleased to announce the upcoming operational Short Time Critical (STC) orbit product for the Sentinel‑1 mission, known as AUX_MOEORB, which will be available starting on 22nd April 2025. This new product, once officially released, will complement the existing portfolio of Predicted (AUX_PREORB), Restituted (AUX_RESORB), and Precise Orbit Ephemerides (AUX_POEORB) orbit file solutions currently offered by the CPOD Service. The product will be available both for Sentinel-1A and Sentinel-1C missions.
The reason for introducing this new file is to provide a significantly reduced timeliness compared to AUX_POEORB, which can take up to a few weeks to be released, while still maintaining a similarly high level of accuracy, thereby directly benefiting users who require faster daily orbit solutions. Furthermore, the file will follow the standard EOF format, ensuring seamless compatibility with existing workflows and alignment with the rest of the Sentinel‑1 orbit products.
The AUX_MOEORB product consists of a daily orbit file including the Sentinel‑1 satellite’s centre of gravity state vector in the Earth‑Centered Earth‑Fixed (ECEF) frame with a 10 second sampling rate. Notably, each file provides 26 hours of orbit coverage, including a one‑hour overlap before and after the nominal 24‑hour window, generated by the following day.
In keeping with the CPOD Service’s standards, the product aims for an orbital accuracy comparable to the existing NTC solutions (AUX_POEORB), with a 3D 1 sigma RMS error better than 5 cm, and a target accuracy of 3 cm.
Once operational, the AUX_MOEORB products will be distributed through the Copernicus Data Space Ecosystem (CDSE) , leveraging the same dissemination channels currently employed by users to access other Sentinel‑1 orbit products.