LROC Experiment Data Record Wide Angle Camera – Mono (EDRWAM)
EDRWAM – Experiment Data Record Wide Angle Camera – Mono
Instrument:PDS Data Set ID: LRO-L-LROC-2-EDR-V1.0
For more information about LROC EDR products, see the EDR Product SIS.
For more information about all LROC products, see the LROC Archive Volume SIS.
The Lunar Reconnaissance Orbiter Camera (LROC) Experiment Data Record Wide Angle Camera – Mono (EDRWAM) data product is a WAC monochromatic image corresponding to a series of framelets, with Digital Number (DN) counts in 8-bit format, companded from 11-bit in the instrument. Each framelet is in row-major order. The EDRWAC stores multispectral framelets in a single band.
The WAC has two lenses imaging onto the same 1024 x 1024 pixel, electronically shuttered CCD area-array, one image in the visible/near infrared (VIS), and the other in the Ultraviolet (UV). In monochrome mode, 1024 x 14 pixels are read out in one visible band (645 nm).
The image file consists of frames in row-major order with a 4 byte validity marker separating each frame. If compression was enabled at image acquisition, the data stream is first decompressed before further processing is performed. Information from the meta-file, housekeeping, and the SOC database are combined to generate the PDS label that combined with the binary data to produce the EDR file.
Specifications for the Monochromatic WAC are in the table below.
| Monochromatic | |||
FOV | 61.4° | |||
IFOV | 1.498 mrad | |||
Image scale (nadir, 50 km altitude) | 74.9 m/pixel | |||
Image frame width | 59.6 km | |||
Image format (each band) | 704 samples x 14 lines | |||
f/# (Ritchey-Chretien) | 5.052 | |||
Effective focal length | 6.013 mm | |||
Entrance pupil diameter | 1.19 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 |
| |||
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 EDRWAM products have the following file names:
tnnnnnnnnnME.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, EDRWAM products have the following product IDs:
TNNNNNNNNNME