CLEM LWIR Experiment Data Record (EDR)

EDR – Experiment Data Record

Instrument: Long Wavelength Infrared Camera

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

For more information about LWIR EDR products, see the EDR Image SIS.

The Long wavelength infrared camera (LWIR) 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.

LWIR is used for science observations. It has a single spectral filter at a wavelength of 8750 nm. Each LWIR EDR image is 128 lines by 128 samples.

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

LLfxxxxy.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

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

mLfxxxxy.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:

LLFXXXXY.NNN

MLFXXXXY.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 only
E	-50 to -40	A only
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