11:00 AM - 1:00 PM
[SGD02-P05] Precise orbit determination of non-standard SLR satellites: (1) Satellite shape models
Keywords:Satellite laser ranging, Precise orbit determination, Space geodesy
Among 100+ satellites assigned by International Laser Ranging Service, compact spherical satellites in stable orbits like LAGEOS, LAGEOS-2 and also LARES are widely used for geodetic purposes, and additional spherical satellites such as Ajisai, Starlette and Stella are often being used for gravity studies.
In this study, we test a couple of more satellites.
LARETS is a Russian test satellite with a spherical shape, launched in September 2003. Due to the less amount of SLR data and unclear centre-of-mass correction values, it has not been used for geodesy so often. Looking into its pre-launch literature on the optical components and based on the private communications, it is suspected the officially provided centre-of-mass correction (56.2 mm) is too small.
SARAL is an altimeter satellite of India and France, launched in February 2013. Along with DORIS, SLR data is used for the precise orbit determination. The details of its satellite micromodel is available in International DORIS Service website, and we implement the so-called Box-Wing 3D model that is required for precise model of radiation pressure and atmospheric drag. We demonstrate the Box-Wing model shows a better fit to SLR observations.
These satellites are tested in the Earth gravity determination, which is reported by the succeeding presentation (Matsuo and Otsubo, 2022).
In this study, we test a couple of more satellites.
LARETS is a Russian test satellite with a spherical shape, launched in September 2003. Due to the less amount of SLR data and unclear centre-of-mass correction values, it has not been used for geodesy so often. Looking into its pre-launch literature on the optical components and based on the private communications, it is suspected the officially provided centre-of-mass correction (56.2 mm) is too small.
SARAL is an altimeter satellite of India and France, launched in February 2013. Along with DORIS, SLR data is used for the precise orbit determination. The details of its satellite micromodel is available in International DORIS Service website, and we implement the so-called Box-Wing 3D model that is required for precise model of radiation pressure and atmospheric drag. We demonstrate the Box-Wing model shows a better fit to SLR observations.
These satellites are tested in the Earth gravity determination, which is reported by the succeeding presentation (Matsuo and Otsubo, 2022).