Yaw attitude estimation for the Tracking and Data Relay Satellite System

We present various performance trades for multiantenna global navigation satellite system (GNSS) multisensor attitude estimation systems. In particular, attitude estimation performance sensitivity to various error sources and system configurations is assessed. This study is motivated by the need for system designers, scientists, and engineers of airborne astronomical and remote sensing platforms to better determine which system configuration is most suitable for their specific application. In order to assess performance trade-offs, the attitude estimation performance of various approaches is tested using a simulation that is based on a stratospheric balloon platform. For GNSS errors, attention is focused on multipath, receiver measurement noise, and carrier-phase breaks. For the remaining attitude sensors, different performance grades of sensors are assessed. Through a Monte Carlo simulation, it is shown that, under typical conditions, sub-0.1-degree attitude accuracy is available when using multiple antenna GNSS data only, but that this accuracy can degrade to degree level in some environments warranting the inclusion of additional attitude sensors to maintain the desired level of accuracy. Further, we show that integrating inertial sensors is more valuable whenever accurate pitch and roll estimates are critical.

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Investigating the GALILEO and BeiDou orbit accuracy derived from rapid products

Academic Perspective Procedia ◽

10.33793/acperpro.03.01.62 ◽

2020 ◽

Vol 3 (1) ◽

pp. 316-321

Author(s):

Sermet Ogutcu ◽

Salih Alcay ◽

Omer Faruk Atiz

Keyword(s):

Orbit Determination ◽

Precise Orbit Determination ◽

Solar Radiation Pressure ◽

Satellite Orbit ◽

Satellite System ◽

Precise Orbit ◽

Yaw Attitude ◽

Global Navigation Satellite ◽

Cross Track ◽

Mean Square Errors

In recent years, the advances of the new Global Navigation Satellite System (GNSS) constellations including, Galileo and BeiDou (BDS), have undergone dramatic changes. Some analysis centers (ACs) produce precise orbit and clock products of Galileo and BeiDou constellations. Currently, three types of Galileo and BeiDou satellite orbit and clock products are available &ndash; namely, precise, rapid and ultra-rapid products &ndash;. Ultra-rapid and rapid products are generally used for time-constrained applications. Precise orbit determination (POD) of Galileo and BeiDou is much challenging compared with GPS and GLONASS constellations due to the officially undetermined receiver phase center offset (PCO), variations (PCV) of Galileo and BeiDou constellations and, also some other not well-defined factors such as yaw-attitude models and solar radiation pressure. In this study, GALILEO orbit accuracy is investigated using rapid products produced by Center for Orbit Determination in Europe (CODE) GeoForschungsZentrum (GFZ) and Wuhan University (WUHAN), while GFZ and WUHAN rapid products are used for BeiDou constellation only. One month (January) of data in 2020 is used to compute errors of radial, along-track, and cross-track components of Galileo and BeiDou orbit derived by rapid products compared with the CODE final Multi-GNSS Experiment (MGEX) product which is assumed as the reference product. The results show that no significant differences between the products are found for Galileo orbit. For BeiDou orbit, WUHAN rapid product produced the smaller root mean square errors (RMSEs) of orbit components compared with the GFZ rapid product.

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QZS-1 Yaw Attitude Estimation Based on Measurements from the CONGO Network

Navigation ◽

10.1002/navi.18 ◽

2012 ◽

Vol 59 (3) ◽

pp. 237-248 ◽

Cited By ~ 9

Author(s):

A. Hauschild ◽

P. Steigenberger ◽

C. Rodriguez-Solano

Keyword(s):

Attitude Estimation ◽

Yaw Attitude

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GNSS Yaw-Attitude Estimation: Results for QZSS Block-II Satellites Using Single- or Triple-Frequency Signals from two Antennas

Proceedings of the 31st International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2018) ◽

10.33012/2018.16080 ◽

2018 ◽

Author(s):

A. Hauschild

Keyword(s):

Attitude Estimation ◽

Triple Frequency ◽

Yaw Attitude

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In-Orbit Results and Attitude Analysis of the SNUGLITE Cube-Satellite

Applied Sciences ◽

10.3390/app10072507 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2507

Author(s):

O-Jong Kim ◽

Hanjoon Shim ◽

Sunkyoung Yu ◽

Yonghwan Bae ◽

Changdon Kee ◽

...

Keyword(s):

Low Cost ◽

Satellite System ◽

Attitude Estimation ◽

Unit Cube ◽

The Sun ◽

Solar Panels ◽

Linear Quadratic ◽

National University ◽

Seoul National University ◽

Global Navigation Satellite

SNUGLITE (Seoul National University Global navigation satellite system Laboratory satellITE) is a two-unit cube satellite (CubeSat) with dimensions 10 × 10 × 23 cm that requires an attitude system for missions and ground station telecommunication. A linear-quadratic-Gaussian-based optimal attitude system for the CubeSat platform has been developed using low-cost sensors, with the in-orbit verification of the attitude system being is one of main study objectives. Since launch, the SNUGLITE CubeSat has continuously broadcast in-orbit status information. In this study, a methodology for the analysis of in-orbit attitude estimation results using received data is presented, and this was achieved by comparing two sun-pointing vectors, i.e., the sun-pointing vector calculated using estimated attitude with the positions of the sun and the satellite and the reference vector generated by the power levels of the solar panels. Because the satellite position was required for the attitude analysis, the verification of the performance of the own-developed on-board Global Positioning System (GPS) receiver is also briefly described. Analyses indicate that the attitude estimation of the SNUGLITE CubeSat has achieved an in-orbit real-time pointing accuracy with a root mean square of 6.1°.

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Precise Orbit and Clock Products of Galileo, BDS and QZSS from MGEX Since 2018: Comparison and PPP Validation

Remote Sensing ◽

10.3390/rs12091415 ◽

2020 ◽

Vol 12 (9) ◽

pp. 1415 ◽

Cited By ~ 2

Author(s):

Xingxing Li ◽

Yiting Zhu ◽

Kai Zheng ◽

Yongqiang Yuan ◽

Gege Liu ◽

...

Keyword(s):

Solar Radiation Pressure ◽

Satellite System ◽

Navigation Satellite ◽

Precise Orbit ◽

The North ◽

Positioning Errors ◽

Yaw Attitude ◽

Critical Issues ◽

Clock Estimation ◽

Global Navigation Satellite

In recent years, the development of new constellations including Galileo, BeiDou Navigation Satellite System (BDS) and Quasi-Zenith Satellite System (QZSS) have undergone dramatic changes. Since January 2018, about 30 satellites of the new constellations have been launched and most of the new satellites have been included in the precise orbit and clock products provided by the Multi Global Navigation Satellite System (Multi-GNSS) Experiment (MGEX). Meanwhile, critical issues including antenna parameters, yaw-attitude models and solar radiation pressure models have been continuously refined for these new constellations and updated into precise MGEX orbit determination and precise clock estimation solutions. In this context, MGEX products since 2018 are herein assessed by orbit and clock comparisons among individual analysis centers (ACs), satellite laser ranging (SLR) validation and precise point positioning (PPP) solutions. Orbit comparisons showed 3D agreements of 3–5 cm for Galileo, 8–9 cm for BDS-2 inclined geosynchronous orbit (IGSO), 12–18 cm for BDS-2 medium earth orbit (MEO) satellites, 24 cm for BDS-3 MEO and 11–16 cm for QZSS IGSO satellites. SLR validations demonstrated an orbit accuracy of about 3–4 cm for Galileo and BDS-2 MEO, 5–6 cm for BDS-2 IGSO, 4–6 cm for BDS-3 MEO and 5–10 cm for QZSS IGSO satellites. Clock products from different ACs generally had a consistency of 0.1–0.3 ns for Galileo, 0.2–0.5 ns for BDS IGSO/MEO and 0.2–0.4 ns for QZSS satellites. The positioning errors of kinematic PPP in Galileo-only mode were about 17–19 mm in the north, 13–16 mm in the east and 74–81 mm in the up direction, respectively. As for BDS-only PPP, positioning accuracies of about 14, 14 and 49 mm could be achieved in kinematic mode with products from Wuhan University applied.

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