urn:nasa:pds:context:instrument:vis.lcross 1.0 1.7.0.0 Product_Context 2016-10-01 1.0 extracted metadata from PDS3 catalog and modified to comply with PDS4 Information Model urn:nasa:pds:context:instrument_host:spacecraft.lcross::1.0 instrument_to_instrument_host unk reference.TBD VISIBLE CAMERA Imager not applicable not applicable Instrument Overview =================== The LCROSS visible camera (VIS) is a ruggedized NTSC color video camera from the RocketCam(TM) camera family developed by Ecliptic Enterprises, Inc. The unit consists of a camera module and a lens. The camera's focal plane CCD sensor is 752 [H] x 582 [V] pixel format, operating at 30 Hz (60 Fields/Sec). The flight unit's lens is a 12 mm (focal length), f/1.2 lens providing a 30.1 deg [H] x 22.8 deg [V] (37.6 deg [Diagonal]) field-of-view. Interlaced NTSC fields are sampled by the Data Handling Unit (DHU) at 720 x 243 resolution resulting in a final image resolution of 720 x 486 pixels. Each pixel is 24-bit RGB with 8 bits per color channel. These images are compressed using a lossy compression algorithm performed by the Analog Devices 611 Video Codec set on 80% quality and decompressed on the ground. The visible camera's peak power during operation is 2.9 W. The VIS camera has been fixed to an auto-gain/white balance setting. Scientific Objectives ===================== The VIS camera provides context imagery to support interpretation of data collected by the other LCROSS instruments. Calibration =========== There are no calibration files associated with this instrument. Operational Modes ================= The VIS camera has one operational mode: auto-gain and white balance enabled. The DHU can vary the rate at which images are downlinked by discarding images from the 30 images/sec input stream, and several different frame rates are used at different points in the mission.