The LCROSS visible camera is a ruggedized analog video camera with the primary scientific objectives of providing context imagery of the Centaur impact and resulting plume, monitoring the ejecta cloud morphology, and determining the visible grain categories. The camera comprises a focal plane CCD sensor, 752 x 582 pixels, each pixel is 24-bit RGB, 8 bits per color channel. It operates at 30 Hz (60 fields/sec). The f/1.2, 12 mm focal length lens provides a 30.1 x 22.8 degree field of view. Final image resolution, after sampling by the Data Handling Unit, is 720 x 486 pixels. The camera is mounted on the inboard side of the LCROSS R6 radiator panel with its aperture pointing in the +X spacecraft direction.

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.

extracted metadata from PDS3 catalog and
                    modified to comply with PDS4 Information Model

LCROSS Visible Camera

Description

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