Precise Orbit Determination for Haiyang 2A Satellite Using Un-differenced DORIS Code and Phase Measurements
Currently, the third generation DORIS instrument named DGXX has been developed and equipped on Jason-2, Cryosat-2, Saral and Chinese Haiyang 2A satellite. Compared with the previous ones, the DGXX has seven measurement channels, and is able to provide syn
- PDF / 581,095 Bytes
- 9 Pages / 439.37 x 666.142 pts Page_size
- 102 Downloads / 181 Views
Precise Orbit Determination for Haiyang 2A Satellite Using Un-differenced DORIS Code and Phase Measurements Quan Zhou, Jing Guo and Qile Zhao
Abstract Currently, the third generation DORIS instrument named DGXX has been developed and equipped on Jason-2, Cryosat-2, Saral and Chinese Haiyang 2A satellite. Compared with the previous ones, the DGXX has seven measurement channels, and is able to provide synchronous dual frequency phase and code measurements. The orbits could be determinated based on the dual frequency phase and pseudo-range measurements directly, and the systematic errors could be analyzed. This contribution presents the algorithm for precise orbit determination with DORIS code and phase measurements. In addition, the orbit of HY2A are determinated from January to May 2012 using Position And Navigation Data Analyst software. The differences with respect to CNES POE orbits indicate that the accuracy in radial and 3D is 1.0 and 5.3 cm, respectively. Satellite laser ranging validation the accuracy of HY2A orbits is about 2.24 cm. Compared with the orbits computed with Doppler measurements, the accuracy of orbits computed with un-differenced phase observables in along-track and radial is a bit higher, the lower accuracy in cross-track maybe caused by inaccuracy receiver DORIS clock. Keywords HY2A determination
DORIS
Pseudo-range and phase
Precise orbit
Q. Zhou (&) Test and Assessment Research Center, China Satellite Navigation office, 1 Fengyingdong Road, Beijing 10094, China e-mail: [email protected] J. Guo Q. Zhao GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China e-mail: [email protected] Q. Zhao e-mail: [email protected]
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2014 Proceedings: Volume III, Lecture Notes in Electrical Engineering 305, DOI: 10.1007/978-3-642-54740-9_3, Springer-Verlag Berlin Heidelberg 2014
31
32
Q. Zhou et al.
3.1 Introduction Haiyang 2A (HY2A), launched on 16 August 2011 and developed by China Academy of Space Technology (CAST) and National Satellite Ocean Application Service (NSOAS), whose primary focus is scientific investigation of ocean topography, dynamics and environment [1, 2]. As we all know, satellite orbit is the foundation of altimeter data processing. Orbit error will directly affect the calculation of sea surface height, further effect the satellite altimetry products. For this reason, the precise orbit determination of HY2A is an important task of the satellite, and it is critical to determine their level of application. Three tracking systems for precise orbit determination (POD) are equipped to satisfy the required 10 cm threshold for POD, namely, Global Positioning System (GPS), Doppler Orbitography and Radiopositioning integrated by Satellite (DORIS) and Satellite Laser Ranging (SLR) [1, 2]. Particularly, the Doris instrument on HY2A is the first of a new generation, named DGXX. Compared with the previous two generations of DORIS-instrument, the new satellite receivers (DGXX) have now seven m
Data Loading...
