PygmalionOfCyprus
commented
2 years ago Added 495. We don't really model space sensors with enough fidelity ATM so I've just given it 4 generic sat visual cameras. The differences between satellite camera types, resolution, etc. aren't reflected so it isn't worth the effort to individually model them, at least not yet.
DB Selector
DB3K
Hypothetical
No
Series Name
VRSS-1 (Venezuelan Remote Sensing Satellite-1), aka (Satellite) Francisco Miranda
Satellite Type
IMGSAT
Country
Venezuela
Service
Bolivarian Agency for Space Activities (ABAE)
In Commission
29 September 2012 -
Length (m)
1.53
Width/Span (m)
1.51 (panels are 1.11 x 0.85m, 3 per side, so estimate 6.61m total)
Height (m)
2.16
Weight (kg)
880
Is Geostationary
No
TLE
1 38782U 12052A 22156.83624162 .00000415 00000-0 66572-4 0 9996 2 38782 97.6602 195.8534 0017217 358.9870 1.1289 14.76320388522162
Sensors
Copied straight from source:
VRSS-1 is the first Chinese satellite with both high-resolution cameras and wide-swath cameras. There are four cameras, including 18 CCDs, and four X-band data transmission antennae implemented on VRSS-1.
Note: The description of the cameras was provided by Romina Acevedo and the VRSS team of the Bolivarian Agency for Space Activities (ABAE) of Venezuela.
PMC (PAN and Multispectral Camera)
PMC is a high-resolution pushbroom imager (2 cameras) with TDI (Time Delay Integration) capability observing in the visible range at a resolution of 2.5 m in PAN, and of 10 m in MS (Multispectral)mode.
The PMC is composed of two identical camera sets and a thermal control unit which is shared with the WMC. Each camera set includes the camera mainframe, camera management & control unit, DC/DC converter, and the baffle. Each camera comprises lenses and a focal plane assembly. The lenses use a three-mirror reflection aspheric optical system with a focal length of 2.6 m,an aperture diameter of 26 cm, a relative aperture of 1/10, and a FOV (Field of View) angle of 2.7º. A multi-chromatic TDI CCD is used as focal plane receiver in order to solve the lack of the camera input energy. The images of the target object on the camera focal plane are being converted to analog video signals for the different bands through a multi-spectrum TDI CCD. These analog signals are then digitized into 10 bit samples. Finally after synthesizing and inserting image auxiliary data, the digital signals are being send to the data transmission subsystem.
WMC (Wide-swath Multispectral Camera)
WMC is a medium-resolution pushbroom camera set (2 cameras) with TDI (Time Delay Integration) capability observing in the visible range at a spatial resolution of 16 m in MS mode. WMC is composed of two mainframes, one camera management & control unit; each camera set includes a mounting bracket, a baffle and a thermal control unit shared with the PMC.
WMC is a refractive optical system with the beam splitting prism, which divides the incident light into 4 spectral bands onto 4 CCD devices, located at the FPA. After the photoelectric conversion, the detectors output signals are processed by signal processing circuit, and transmitted to the ground through the DTS (Data Transfer System).
Comments
The VRSS series satellites provide a limited (2.5m resolution max) but still tactically useful space imaging capability to Venezuelan forces.
Sources
https://en.wikipedia.org/wiki/VRSS-1 https://directory.eoportal.org/web/eoportal/satellite-missions/v-w-x-y-z/vrss-1 https://docs.disasterscharter.org/missions/opt/vrss-1/ https://www.un-spider.org/node/11767 https://space.skyrocket.de/doc_sdat/vrss-1.htm https://www.n2yo.com/satellite/?s=38782