On-Orbit Calibration of Installation Matrix between Remote Sensing Camera and Star Camera Based on Vector Angle Invariance

Tang, Yujie; Wei, Zhenzhong; Wei, Xinguo; Li, Jian; Wang, Gangyi

doi:10.3390/s20195667

Cited by 2 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Up to now, a large number of studies have been conducted on on-orbit calibration to improve the positioning accuracy of RSCs. The early published work commonly focused on constructing the positioning models through GCPs in calibration test sites [ 19 ]. especially, according to 33 GPS-surveyed GCPs in the Denver test site, the calibration of in-flight field angle map was performed to reduce the interior orientation systematic errors of the camera of IKONOS, and the residual errors were within ±1 pixel [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

On-Orbit Geometric Calibration from the Relative Motion of Stars for Geostationary Cameras

Jiang

et al. 2021

Sensors

View full text Add to dashboard Cite

Affected by the vibrations and thermal shocks during launch and the orbit penetration process, the geometric positioning model of the remote sensing cameras measured on the ground will generate a displacement, affecting the geometric accuracy of imagery and requiring recalibration. Conventional methods adopt the ground control points (GCPs) or stars as references for on-orbit geometric calibration. However, inescapable cloud coverage and discontented extraction algorithms make it extremely difficult to collect sufficient high-precision GCPs for modifying the misalignment of the camera, especially for geostationary satellites. Additionally, the number of the observed stars is very likely to be inadequate for calibrating the relative installations of the camera. In terms of the problems above, we propose a novel on-orbit geometric calibration method using the relative motion of stars for geostationary cameras. First, a geometric calibration model is constructed based on the optical system structure. Then, we analyze the relative motion transformation of the observed stars. The stellar trajectory and the auxiliary ephemeris are used to obtain the corresponding object vector for correcting the associated calibration parameters iteratively. Experimental results evaluated on the data of a geostationary experiment satellite demonstrate that the positioning errors corrected by this proposed method can be within ±2.35 pixels. This approach is able to effectively calibrate the camera and improve the positioning accuracy, which avoids the influence of cloud cover and overcomes the great dependence on the number of the observed stars.

show abstract

Section: Introductionmentioning

confidence: 99%

On-Orbit Geometric Calibration from the Relative Motion of Stars for Geostationary Cameras

Jiang

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

Thermal Deformation Analysis of a Star Camera to Ensure Its High Attitude Measurement Accuracy in Orbit

Jiang,

Wang,

Deng

et al. 2024

Remote Sensing

View full text Add to dashboard Cite

With the continuous advancement of high-resolution satellite technology, the impact of thermal deformation on the performance of star cameras is becoming more significant, particularly in relation to installation conditions and orbital environments. To address this challenge, an in-depth investigation of the thermal design of a star camera is conducted in this study. The thermal deformation of this camera is evaluated systematically through simulation analysis, thermal balance tests, and on-orbit temperature measurements. In addition, a simulation analysis is used to identify and quantitatively evaluate the thermal deformation error sources that affect the spatial attitude measurement accuracy of the star camera. The results indicate that thermal deformations of the optical system, the mounting surface of the star camera, and the support significantly impact on-orbit measurement accuracy. Ultimately, the limit error attributable to on-orbit thermal deformation is determined to be 0.62″. In the thermal balance experiments, the maximum absolute difference between the test results and the thermal simulation analysis results is under 1.8 °C. Additionally, analysis of the orbital temperature data reveals that the maximum absolute difference between the orbital results and the thermal simulation results is 1.18 °C, while the attitude accuracy of the star sensor is better than 0.54″. These findings validate the effectiveness of the thermal design and the accuracy of the thermal simulation analysis. The analysis of error sources presented in this paper offers crucial insights for effectively controlling the thermal deformation errors of star cameras and lays the groundwork for optimizing overall thermal design.

show abstract

On-Orbit Calibration of Installation Matrix between Remote Sensing Camera and Star Camera Based on Vector Angle Invariance

Cited by 2 publications

References 15 publications

On-Orbit Geometric Calibration from the Relative Motion of Stars for Geostationary Cameras

On-Orbit Geometric Calibration from the Relative Motion of Stars for Geostationary Cameras

Thermal Deformation Analysis of a Star Camera to Ensure Its High Attitude Measurement Accuracy in Orbit

Contact Info

Product

Resources

About