CLEM NIR Experiment Data Record (EDR)

EDR – Experiment Data Record

PDS Data Set ID: CLEM1-L/E/Y-U-2-EDR-V1.0DOI: 10.17189/1520261

The Near infrared camera (NIR) Experiment Data Record (EDR) data products are raw images. Data have been depacketized and reformatted, but are otherwise “raw”. Raw data contain the geometric and radiometric characteristics of unprocessed and unrectified data. To make full utilization of the data, it is necessary to perform radiometric and geometric processing on the data products.

NIR is used for science observations. It has a filter wheel that allow images to be acquired under six spectral filters at wavelengths of 1100 nm, 1250 nm, 1500 nm, 2000 nm, 2600 nm, and 2780 nm. Each NIR EDR image is 256 lines by 256 samples.

NIR EDR lunar mapping phase products have the following file names:

LNfxxxxy.nnn

where:

f = filter wheel position = A, B, C, D, E, F, or “_”

xxxx = frame number within revolution

y = latitude bin for lunar mapping observations; signifies a latitude range on the lunar surface where the observation was made (see table below)

rrr = 3-digit orbit number

NIR EDR non-lunar mapping phase products have the following file names:

mNfxxxxy.nnn

where:

m = Mission Phase

A = Earth phasing loop A

B = Earth phasing loop B

f = filter wheel position = A, B, C, D, E, F, or “_”

xxxx = frame sequence number within a download dump of the spacecraft’s solid state recorder; the solid state recorder, holding acquired images, is periodically downloaded to Earth; images are number sequentially by time of observation

y = alpha character; each 100 sequential images of a camera are assigned an alpha character A-Z

rrr = memory download sequence number; incremented by one each time a download is made of the solid state data recorder within a mission phase

In ODE, EDR products have the following product IDs:

LNFXXXXY.NNN

MNFXXXXY.NNN

Latitude bin for lunar mapping observations and alpha character for non-lunar mapping phase:

Character	Lunar Mapping Latitude Bins	Non-Lunar Mapping Phasing Loop
A	-90 to -80	A or B
B	-80 to -70	A or B
C	-70 to -60	A or B
D	-60 to -50	A or B
E	-50 to -40	A or B
F	-40 to -30	A only
G	-30 to -20	A only
H	-20 to -10	A only
I	-10 to 0	A only
J	0 to 10	A only
K	10 to 20	A only
L	20 to 30	A only
M	30 to 40	A only
N	40 to 50	A only
O	50 to 60	A only
P	60 to 70	A only
Q	70 to 80	A only
R	80 to 90	N/A
S	“unknown” targets	N/A
T	Earth observations prior to systematic mapping	N/A
U	Sky observations prior to systematic mapping	N/A
V	Lunar observations prior to systematic mapping	N/A
W	Sky observations after systematic mapping	N/A
Y	Earth observations after systematic mapping	N/A
Z	Lunar observations after systematic mapping	N/A