Geosynchronous satellites expanding a future GNSS satellite constellation: A precise orbit determination study

Marz, Stefan; Schlicht, Anja; Hugentobler, Urs

doi:10.1016/j.asr.2022.11.009

Cited by 2 publications

(11 citation statements)

References 30 publications

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“…For this paper, we evaluate the impact of different high-precision observation techniques used by a future GNSS satellite constellation for the estimation of satellite clocks. The whole simulation and estimation procedure is equal to [17]. For the simulations and analysis, we used a modified version of Bernese GNSS Software 5.2 [25].…”

Section: Simulation Setup and Estimationmentioning

confidence: 99%

“…Optical two-way Inter-Satellite Links (OISL) is one measurement technique to perform high-precision dual one-way satellite-to-satellite tracking with a laser [8,[15][16][17]. The impact of different ISL connectivity schemes was simulated in [15,18].…”

Section: Introductionmentioning

confidence: 99%

“…In [16], we compared the OISL and OTWL measurement techniques and showed the benefits of synergistically using both techniques with Galileo L-band measurements for the POD of MEO satellites. In [17], we expanded the MEO satellite constellation by using inclined geosynchronous orbit (IGSO) and GEO satellites and analyzed the orbit errors. The resulting orbit errors from [17] showed that combinations of these measurement techniques also increase the orbit accuracy of IGSO and GEO satellites to the millimeter level.…”

Section: Introductionmentioning

confidence: 99%

“…In [17], we expanded the MEO satellite constellation by using inclined geosynchronous orbit (IGSO) and GEO satellites and analyzed the orbit errors. The resulting orbit errors from [17] showed that combinations of these measurement techniques also increase the orbit accuracy of IGSO and GEO satellites to the millimeter level.…”

Section: Introductionmentioning

confidence: 99%

“…While we only analyzed the orbit errors in [16,17], in this study we focus on the analysis of the satellite clocks from the simulation scenarios, which are identical to [17]. Our target is to estimate the satellite clocks, with respect to the reference clock, with an accuracy at the picosecond level.…”

Section: Introductionmentioning

confidence: 99%

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Toward a Geodesy and Time Reference in Space (GETRIS): A Study of Apparent Satellite Clocks of a Future GNSS Satellite Constellation

2023

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Today, concepts within the Global Geodetic Observing System (GGOS) aim a Terrestrial Reference System (TRS) with 1 mm accuracy and long-term stability of 0.1 mm/year. GETRIS (Geodesy and Time Reference In Space) is a concept that aims to realize a relativistic reference system based on satellites as an extension to the TRS. This helps with another goal of the GGOS, namely, the connection of different satellite layers with the TRS. For a valuable contribution to the GGOS’s goals, we would expect to achieve precise determined satellite orbits at the level of 1–3 mm and satellite clocks with a picosecond accuracy. The use of increasingly precise links helps to improve the satellite precise orbit determination (POD) and is necessary to synchronize the clocks in the satellite/station network. We analyze a complementary use of high-precision optical dual one-way links at the level of 1 mm precision together with the L-band. In previous studies, we analyzed the benefit for satellite POD, achieving Medium Earth Orbit (MEO) as well as geosynchronous orbit (GSO) accuracies at the low-millimeter level. In this work, we analyze the capabilities for clock synchronization. We compare two different clock types for estimation and prediction. We analyze different satellite constellations and different combinations of measurement links.

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Section: Simulation Setup and Estimationmentioning

confidence: 99%