LROC Calibrated Data Record Wide Angle Camera (CDRWAC)

CDRWAC – Experiment Data Record Wide Angle Camera

Instrument: Lunar Reconnaissance Orbiter Camera

PDS Data Set ID: LRO-L-LROC-3-CDR-V1.0

For more information about LROC CDR products, see the CDR Product SIS.

For more information about all LROC products, see the LROC Archive Volume SIS.

The Lunar Reconnaissance Orbiter Camera (LROC) Calibrated Data Record Wide Angle Camera – Color (CDRWAC) data products contain calibrated WAC 7-band color image data corresponding to a series of framelet images. WAC Digital Numbers (DNs) are decompanded and images are radiometrically calibrated to radiance (i.e. star observations) or I/F (i.e. lunar observations). The CDRWAC stores multispectral framelets in a single band. The file will require further processing to separate framelets into their respective bands and to align the bands, in order to be viewed as a standard multi-band image. The CDRWAC data are delivered in 16-bit format.

Specifications for the Color WAC are in the table below.

	Visible	UV
FOV	61.4°	58.96°
IFOV	1.498 mrad	7.67 mrad (4x4 binned)
Image scale (nadir, 50 km altitude)	74.9 m/pixel	383.5 m/pixel (binned)
Image frame width	59.6 km	56.8 km
Image format (each band)	704 samples x 14 lines	128 samples x 4 lines (binned)
f/# (Ritchey-Chretien)	5.052	5.65
Effective focal length	6.013 mm	4.693 mm
Entrance pupil diameter	1.19 mm	0.85 mm
System MTF (Nyquist)	0.37
Gain	25.9 ± 0.7 e-/DN
Noise	66 ± 4 e-
Detector fullwell	46,100 ± 3600 e-
Band | λeff | FWHM	320 nm 321 nm 32.3 nm 360 nm 360 nm 14.9 nm 415 nm 415 nm 36.1 nm 565 nm 566 nm 20.1 nm 605 nm 604 nm 20.4 nm 645 nm 643 nm 22.5 nm 690 nm 689 nm 38.6 nm
SNR (at 1000 DN)	> 150
Detector digitization	11-bit, encoded to 8-bits
Lossless compression ratio	1.7:1
Electronics	4 circuit boards
Detector	Kodak KLA-1001
Pixel format	1,024 x 1,024
Voltage	28 ± 7V DC
Peak power	2.7 W
Orbit average power	2.6 W
Mass	0.9 kg
Volume (width x length x height)	15.8 cm x 23.2 cm x 32.3 cm (incl. radiator)

LROC CDRWAC products have the following file names:

tnnnnnnnnnCC.IMG

where:

t = target

M = Moon

E = Earth

C = calibration

S = star

nnnnnnnnn = 9-digit Mission Elapsed Time of acquisition (with a single digit for partition which denotes a reset of the MET)

In ODE, CDRWAC products have the following product IDs:

TNNNNNNNNNCC