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Precise Relative Positioning in MEO to support Science Missions
Precise relative positioning in MEO (Medium Earth Orbit, at altitudes ranging between 2,000 and 36,000 km) exploiting GNSS is a subject that has been little explored while having high potential for enabling an interesting set of applications based on space-to-space interferometry.
Establishing accurate inter-satellite baselines based on GNSS measurements would open the door to new missions at…
Emits link: https://emits.sso.esa.int/emits/owa/emits.mainl
Multi-Sensor, Multi-System for Space PNT Applications
Position uncertainty during autonomous manoeuvres such as orbit-raising/de-orbiting requires that the local knowledge during low thrust (i.e. with electric propulsion) is accurately determined.
Current orbit-raising assumes semi-autonomous control assisted by GNSS, with a long time integral to measure increasing altitude and trajectory of the satellite.
The use of a hybrid GNSS unit that…
Emits link: https://emits.sso.esa.int/emits/owa/emits.mainl
Enabling Ultra-High Accuracy Positioning in Challenging Environment
The need for high accuracy PNT in challenging environments has become obvious and, henceforth, mandatory for many applications. Currently, an accuracy target of 1 m in an urban environment seems a realistic achievement with multi-GNSS PPP or RTK capabilities. A significant R&D effort is ongoing to reach this target in operational products, using carrier phase positioning (PPP and RTK) and European…
Emits link: https://emits.sso.esa.int/emits/owa/emits.mainl
Earth-Moon Navigation / System Study and Development of a Highly-Sensitive Spaceborne Receiver Prototype
GPS has been used in space for more than 20 years and currently it is consistently used in LEO orbit satellites in order to provide position, velocity and time information. Extension of its use to higher altitude missions has been the subject of multiple studies, GEO and GTO orbits currently exploit GNSS signals and the NASA Magnetospheric Multiscale (MMS) mission has recently demonstrated that…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
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