Acta Photonica Sinica, Volume. 48, Issue 12, 1228002(2019)
Space Target Luminosity Measurement Based on Video Remote Sensing Satellites
Figures & Tables(14)
Fig. 1. Image of the International Space Station taken by video remote sensing satellite
Fig. 2. Imaging mode of space target photographed by video satellite
Fig. 5. Curve of relationship between image DN value and target radiance
Fig. 6. Curve of relationship between exposure time and signal-to-noise ratio
Fig. 8. Relation curve between gray level of central pixel and standard deviation of inversion magnitude
Table 1. Main parameters of Jilin-1 video satellite
View tableView in ArticleTable 1. Main parameters of Jilin-1 video satellite
Parameter Value Orbittype SSO Orbit altitude 535.35 km Resolution Video Multi-spectral 0.92 m 3 m Width 19 km×4.5 km Band Visible，BGR Bayer Quantization 12 bit Control system Three-axis stabilized Attitude stability 0.001°/s(3σ) Pointing precision 0.03°(3σ)
Table 2. Main parameters of optical system and detector
View tableView in ArticleTable 2. Main parameters of optical system and detector
Parameter Value Focallength 3 200 mm Aperture 320 mm Pixel size 5.5 μm×5.5 μm Darknoise ＜6 e-·s-1·pix-1 Readoutnoise 3.8 e- Quantumefficiency 60% FWC 21.5 ke-
Table 3. Stellar photometric inversion results
View tableView in ArticleTable 3. Stellar photometric inversion results
Reference star number Magnitude Exposure time k Gainβ BaisInversion of magnitude Theoretical calculation error Actual metrical error HIP32349 -1.46 Mv 0.2 ms 3.01 3.76 -1.38 Mv 0.06 Mv 0.08 Mv HIP32349 (defocusing) -1.46 Mv 0.2 ms 3.01 3.76 -1.37 Mv 0.06 Mv 0.09 Mv HIP11767 1.97 Mv 1 ms 14.58 8.58 1.91 Mv 0.09 Mv 0.06 Mv HIP60260 3.55 Mv 5 ms 69.17 18.43 3.69 Mv 0.17 Mv 0.13 Mv
Table 4. Luminosity inversion results of space target
View tableView in ArticleTable 4. Luminosity inversion results of space target
Target Imaging mode Exposure time Imaging distance Angular rate of taget Sun phase angle Inversion of magnitude Satellite target 1 Stable imaging 50 ms 2500 km 0.1°/s 69° 5.67 Mv Satellite target 2 Tracking imaging 8 ms 900 km 0.57°/s 51° 2.98 Mv Satellite target 3 Tracking imaging 10 ms 937 km 0.15°/s 26° 2.35 Mv Rocket debris Stable imaging 5 ms 220 km 2.2°/s 48° 6.52 Mv
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Yan MA, Chi MA, Yan-hao XIE, Fang WANG. Space Target Luminosity Measurement Based on Video Remote Sensing Satellites[J]. Acta Photonica Sinica, 2019, 48(12): 1228002
Paper Information
Category: Remote Sensing and Sensors
Received: Jul. 3, 2019
Accepted: Sep. 20, 2019
Published Online: Mar. 17, 2020
The Author Email: MA Chi (machi_hitedu@163.com)
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