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QHY-174M-GPS Camera as the Device for Photometry of Artificial Satellites

Viktor Kudak
Viktor Kudak
 und 
Vasyl Perig
Vasyl Perig
   | 22. Apr. 2022
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Online veröffentlicht: 22. Apr. 2022
Seitenbereich: 47 - 57
Eingereicht: 14. Apr. 2021
Akzeptiert: 31. Jan. 2022
DOI: https://doi.org/10.2478/arsa-2022-0003
Schlüsselwörter
© 2022 Viktor Kudak et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

QHY-174M GPS CMOS camera (left) and view of the camera with GPS antenna (right)
QHY-174M GPS CMOS camera (left) and view of the camera with GPS antenna (right)

Figure 2.

Left: star profile with Moffat 2D function fit (red). Right: Residuals.
Left: star profile with Moffat 2D function fit (red). Right: Residuals.

Figure 3.

Example of FITS files to process. Object is in the centre of the frame and its shape is point, the stars have trail shape.
Example of FITS files to process. Object is in the centre of the frame and its shape is point, the stars have trail shape.

Figure 4.

Logical diagram of the satellite photometry script
Logical diagram of the satellite photometry script

Figure 5.

Part of LC of Topex/Poseidon artificial satellite (NORAD 22076) observed at Derenivka station on Aug 06 2020 in R filter. Time of exposition 0.2 sec. Photometry errors are 0.006 ÷ 0.040 mag.
Part of LC of Topex/Poseidon artificial satellite (NORAD 22076) observed at Derenivka station on Aug 06 2020 in R filter. Time of exposition 0.2 sec. Photometry errors are 0.006 ÷ 0.040 mag.

Figure 6.

Top: Observations of satellite COSMOS 2502 (NORAD 40358) from two observational sites - Uzhhoorod in B,V filters with use of photo-multiplier (blue and green lines), Derenivka in R filter with QHY174M-GPS camera (red line). Observation made on Nov 09 2020. Bottom: Colour indexes B-V, V-R and B-R
Top: Observations of satellite COSMOS 2502 (NORAD 40358) from two observational sites - Uzhhoorod in B,V filters with use of photo-multiplier (blue and green lines), Derenivka in R filter with QHY174M-GPS camera (red line). Observation made on Nov 09 2020. Bottom: Colour indexes B-V, V-R and B-R

QHY-174M GPS CMOS camera characteristics

Model QHY174GPS M
Sensor SONY IMX174 CMOS
Pixel Size 5.86 μm ×5.86 μm
Effective Pixel Area 1920 × 1200
Effective Image Area 11.25mm×7.03mm
QE 78%
AD Sample Depth 12/10bit (output as 16bit and 8bit)
Frame Rate 138FPS@1936×1216, 260FPS@960×600
Readout Noise 5.3e-@Gain0% 2.8e-@Gain60% 1.6e-@Gain100%
Exposure Time Range from 5 μs to 900 sec
Binning 1×1,2×2
Anti-Glow Control Yes (Reduces amplifier glow significantly)
Shutter Type Electric Global Shutter
Computer Interface USB 3.0 Super Speed
Cooling System Dual Stage TEC cooler (-40C below ambient)
Time-Stamp Precision 1 micro-second of the GPS UTC clock

The goodness of star profile fit with different functions

Function Gauss Lorentz Moffat
R2 0.8623 0.9166 0.9477

Selected standard stars from Landolt catalogue

Star Name mV mR V-R SpType Star Name mV mR V-R SpType
SA 112 275 9.905 9.258 0.647 K2D SA 113 366 13.537 12.914 0.623 –
SA 112 595 11.352 10.453 0.899 K2:III D SA 113 177 13.560 13.104 0.456 –
SA 112 223 11.424 11.151 0.273 F5D SA 113 195 13.692 13.274 0.418 –
SA 112 704 11.452 10.630 0.822 – SA 113 272 13.904 13.534 0.370 –
SA 112 822 11.549 10.991 0.558 G8:IIID SA 113 307 14.214 13.584 0.630 –
SA 112 805 12.086 12.023 0.063 A0D SA 113 182 14.370 13.968 0.402 –
SA 112 250 12.095 11.778 0.317 F8D SA 114 176 9.239 8.439 0.800 K4/5E
SA 113 466 10.004 9.723 0.281 F5D SA 114 670 11.101 10.456 0.645 K1.5:IIID
SA 113 475 10.306 9.736 0.570 G5D SA 114 548 11.601 10.863 0.738 K2D
SA 113 342 10.878 10.341 0.537 – SA 114 654 11.833 11.465 0.368 G0D
SA 113 156 11.224 10.921 0.303 – SA 114 750 11.916 11.889 0.027 B9D
SA 113 259 11.742 11.121 0.621 K0:III D SA 114 446 12.064 11.667 0.397 –
SA 113 493 11.767 11.337 0.430 G5D SA 114 656 12.644 12.097 0.547 K1:IIID
SA 113 440 11.796 11.433 0.363 – SA 115 271 9.695 9.342 0.353 F8D
SA 113 459 12.125 11.818 0.307 – SA 115 516 10.434 9.871 0.563 G8IVD
SA 113 492 12.174 11.832 0.342 G0E SA 115 420 11.161 10.875 0.286 F5D
SA 113 339 12.250 11.910 0.340 F8D SA 115 554 11.812 11.226 0.586 K1.5:IIIC
SA 113 191 12.337 11.866 0.471 – SA 115 412 12.209 11.882 0.327 –
SA 113 495 12.437 11.925 0.512 G:D SA 115 268 12.494 12.128 0.366 –
SA 113 158 13.116 12.709 0.407 –
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