Attitude Determination

Giorgi, Gabriele

doi:10.1007/978-3-319-42928-1_27

Cited by 8 publications

(1 citation statement)

References 45 publications

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“…Other satellite missions featuring GPS attitude determination were UoSAT‐12, TopSat, and Flying Laptop . For a comprehensive overview of GPS attitude determination for other non‐space related applications, the reader is referred to Giorgi …”

Section: Introductionmentioning

confidence: 99%

Flight results of GPS‐based attitude determination for the Canadian CASSIOPE satellite

2020

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The paper presents attitude determination results of the “GPS Attitude, Positioning and Profiling Experiment” (GAP) on board the CASSIOPE satellite using real flight data. The GAP payload consists of five minimally modified commercial‐off‐the‐shelf NovAtel OEM4‐G2L receivers that provide dual‐frequency GPS measurements and allow for attitude and orbit determination of the satellite as well as electron density profiling. To the authors' knowledge, the CASSIOPE mission is the first space mission that provides dual‐frequency observations for attitude determination. The data has been analyzed with a GPS attitude determination algorithm originally developed for the analysis of data from the “Flying Laptop” mission. The GPS‐based solution for selected attitude maneuvers is compared to a reference orientation provided by the satellite's star sensors. Furthermore, an analysis of the typical time‐to‐first‐fix (TTFF) for the attitude solution is provided. The advantage of dual‐frequency ambiguity fixing compared to single‐frequency is assessed.

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Section: Introductionmentioning

confidence: 99%

Flight results of GPS‐based attitude determination for the Canadian CASSIOPE satellite

2020

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GLONASS ambiguity resolution

Teunissen

Khodabandeh

2019

GPS Solut

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A new integer-estimable GLONASS FDMA model is studied and analysed. The model is generally applicable, and it shows a close resemblance with the well-known CDMA models. The analyses provide insights into the performance characteristics of the model and concern a variety of different ambiguity-resolution critical applications. This will be done for geometryfree, geometry-fixed and several geometry-based formulations. Next to the analyses of the model's instantaneous ambiguityresolved positioning and attitude determination capabilities, we show the ease with which the model can be combined with existing CDMA models. We thereby present the instantaneous ambiguity-resolution performances of integrated L1 GPS + GLONASS, both for high-grade geodetic and mass-market receivers. We also consider the potential of the single-frequency combined model for mixed-receiver processing, particularly for the case the between-receiver GLONASS pseudorange data are biased. In all cases, the speed of successful ambiguity resolution is studied as well as the precision with which positioning is determined. Software routines for constructing the model are also provided.

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Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

2022

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Precise orbit determination (POD) is the procedure for determining the orbit of a satellite with high accuracy. Compared with global navigation satellite systems (GNSS), the low Earth orbit (LEO) satellites have some different features in space, mainly due to perturbations caused by dynamic forces related to their altitudes. Methods for POD of LEO satellites have been developed over the last decades. Nowadays, postprocessed precise orbits are used in different space applications such as radio occultation, satellite altimetry, and interferometric syntheticaperture radar missions. The advancements in technology decrease the size of LEO satellites and developments in theory increase their orbital accuracy. In recent years, onboard POD has become a hot topic in the navigation and positioning field, which is crucial for, e.g., formation flying of small satellites and GNSS-aided LEO megaconstellations for positioning purposes. This contribution reviews LEO POD methods based on undifferenced GNSS observations in both postmission and real-time data processing. It comprises the quality control step, the models used and their limitations, processing algorithms, and different validation methods. To have a clear insight into the current and the future state of the LEO POD, the most recent developments and important achievements are also discussed.

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Attitude Determination

Cited by 8 publications

References 45 publications

Flight results of GPS‐based attitude determination for the Canadian CASSIOPE satellite

Flight results of GPS‐based attitude determination for the Canadian CASSIOPE satellite

GLONASS ambiguity resolution

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

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