Infrared and Laser Engineering, Volume. 49, Issue 5, 20190457(2020)
Thermal radiation stray light integration method of infrared camera in geostationary orbit
Figures & Tables(16)
Fig. 2. Calculating process of instrument background radiation stray light for TRSLIM
Fig. 7. Radiation curve of instrument background radiation produced by primary mirror on detector in one day
Fig. 8. Total instrument background radiation curve generated by optical-mechanical components on detector in one day
Fig. 9. SCR curve formed by instrument background radiation in one day
Table 1. Radiation calculation of primary mirror at different time in infrared band
View tableView in ArticleTable 1. Radiation calculation of primary mirror at different time in infrared band
Time Temperature/°C Emissivity Miλ/( W/m2)12:00 −1.3 0.04 0.049 0 20:00 −5.6 0.04 0.040 5 6:00 2.3 0.04 0.057 2
Table 2. Energy transfer factor Bijof nodes of primary mirror to detector
View tableView in ArticleTable 2. Energy transfer factor Bijof nodes of primary mirror to detector
Cond_id Node 1 Node 2 Area*e* Bij Bij Bji 1 COMET.9284 COMET.6790 2.728 026e-05 0.018 532 0.012 89 2 COMET.9284 COMET.6791 5.640 484e-07 0.003 455 921 0.002 322 2 3 COMET.9284 COMET.7308 1.156 538e-06 0.013 559 96 0.001 076 4 COMET.9284 COMET.7309 1.401 487e-06 0.007 363 961 0.003 127 9 …… N -3COMET.9310 COMET.7309 6.087 829E-08 5.18E-05 0.001 187 N -2COMET.9310 COMET.7310 1.103 783E-06 0.009 397 84 0.004 149 N -1COMET.9310 COMET.7311 6.306 837E-07 0.005 369 77 0.001 819 N COMET.9310 COMET.7312 2.469 422E-06 0.002 102 518 0.007 124
Table 3. Radiation calculation of nodes of primary mirror on detector at 12:00
View tableView in ArticleTable 3. Radiation calculation of nodes of primary mirror on detector at 12:00
Cond_id Node 1 Node 2 Bij Ej/ (W/m2)E/ (W/m2)1 COMET.9284 COMET.6779 0.005 853 2 0.000 726 3.712E-04 2 COMET.9284 COMET.6780 0.000 345 592 1 0.000 135 3 COMET.9284 COMET.7270 0.003 559 96 0.000 532 4 COMET.9284 COMET.7271 0.001 363 961 0.000 289 …… N -3COMET.9310 COMET.7271 5.18E-05 2.03E-06 N -2COMET.9310 COMET.7272 0.009 397 84 0.000 368 N -1COMET.9310 COMET.7273 0.000 536 977 0.000 21 N COMET.9310 COMET.7274 0.002 102 518 8.24E-05
Table 4. Radiation calculation of nodes of primary mirror on detector at 20:00
View tableView in ArticleTable 4. Radiation calculation of nodes of primary mirror on detector at 20:00
Cond_id Node 1 Node 2 B ij Ej /(W/m2)E /(W/m2)1 COMET.9284 COMET.6779 0.005 853 2 0.000 595 1.820E-04 2 COMET.9284 COMET.6780 0.000 345 592 1 0.000 111 3 COMET.9284 COMET.7270 0.003 559 96 0.000 435 4 COMET.9284 COMET.7271 0.001 363 961 0.000 236 …… N -3COMET.9310 COMET.7271 5.18E-05 1.66E-06 N -2COMET.9310 COMET.7272 0.009 397 84 0.000 302 N -1COMET.9310 COMET.7273 0.000 536 977 0.000 172 N COMET.9310 COMET.7274 0.002 102 518 6.75E-05
Table 5. Radiation calculation of nodes of primary mirror on detector at 6:00
View tableView in ArticleTable 5. Radiation calculation of nodes of primary mirror on detector at 6:00
Cond_id Node 1 Node 2 Bij Ej //(W/m2)E /(W/m2)1 COMET.9284 COMET.6779 0.005 853 2 0.000 854 5.855E-04 2 COMET.9284 COMET.6780 0.000 345 592 1 0.000 159 3 COMET.9284 COMET.7270 0.003 559 96 0.000 625 4 COMET.9284 COMET.7271 0.001 363 961 0.000 339 …… N -3COMET.9310 COMET.7271 5.18E-05 2.39E-06 N -2COMET.9310 COMET.7272 0.009 397 84 0.000 433 N -1COMET.7273 0.000 536 977 0.000 248 N COMET.9310 COMET.7274 0.002 102 518 9.69E-05
Table 6. Comparison of SCR from on-orbit measured, TRSLIM and TSLAM
View tableView in ArticleTable 6. Comparison of SCR from on-orbit measured, TRSLIM and TSLAM
Time On-orbit test values TRSLIM TSLAM Simulation value Errors from on-orbit test values Simulation value Errors from on-orbit test values 3:00 0.059 0.06 1.69% 0.112 89.83% 8:00 0.064 0.074 15.63% 0.13 103.13% 12:00 0.078 0.091 16.67% 0.144 84.62% 15:00 0.089 0.103 15.73% 0.189 112.36% 18:00 0.095 0.109 14.74% 0.204 114.74% 22:00 0.089 0.098 10.11% 0.179 101.12%
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Lu Qiang. Thermal radiation stray light integration method of infrared camera in geostationary orbit[J]. Infrared and Laser Engineering, 2020, 49(5): 20190457
Paper Information
Category: 红外技术及应用
Received: Dec. 12, 2019
Accepted: Jan. 15, 2020
Published Online: Sep. 22, 2020
The Author Email: Qiang Lu (luqiangac@126.com)
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