LROC Experiment Data Record Wide Angle Camera – UV (EDRWAU)
EDRWAU – Experiment Data Record Wide Angle Camera – UV
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 – UV (EDRWAC) data product is a WAC 2-band Ultraviolet (UV) 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 UV. In color UV mode, only the 512 x 16 UV pixels binned to 128 x 4 pixels, are read out for each band (320 nm and 360 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 UV WAC are in the table below.
| UV | ||||||
FOV | 58.96° | ||||||
IFOV | 7.67 mrad (4x4 binned) | ||||||
Image scale (nadir, 50 km altitude) | 383.5 m/pixel (binned) | ||||||
Image frame width | 56.8 km | ||||||
Image format (each band) | 128 samples x 4 lines (binned) | ||||||
f/# (Ritchey-Chretien) | 5.65 | ||||||
Effective focal length | 4.693 mm | ||||||
Entrance pupil diameter | 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 |
| ||||||
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 EDRWAU products have the following file names:
MnnnnnnnnnUE.IMG
where:
nnnnnnnnn = 9-digit Mission Elapsed Time of acquisition (with a single digit for partition which denotes a reset of the MET)
In ODE, EDRWAU products have the following product IDs:
MNNNNNNNNNUE