LRO LOLA Gridded Data Record Average Visibility of the Sun (GDRVIS)

GDRVIS – Gridded Data Record of Average Visibility of the Sun

Instrument: Lunar Orbiter Laser Altimeter

PDS Data Set ID: LRO-L-LOLA-4-GDR-V1.0

For more information about LOLA RDR and derived products, see the RDR Product SIS.

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

The Lunar Orbiter Laser Altimeter (LOLA) Gridded Data Record of Average Visibility of the Sun (GDRVIS) data products contain two kinds of maps: the average solar illumination on the lunar surface and the average visibility of the Earth from the lunar surface. These maps were obtained through numerical modeling with the LOLA elevation data over one lunar precession cycle (~18.6 years).

Maps are distributed in polar stereographic projection. The 2014 maps have a map resolution at the pole of 240 m/pixel and extend to +/- 770 km in both directions, which corresponds to complete coverage from 65 degrees to the poles, and partial coverage down to ~55.2 degrees.

The value is scaled and offset.

Value = DN * SCALING_FACTOR + OFFSET. (DN = Digital Number)

LOLA GDRVIS 2014 lunar products have the following file names:

AVGVISIB_65p_240Mxxx

where:

p = pole

N = north polar region

S = south polar region

xxx = file type/extension

.IMG = image file

.LBL = detached PDS label

.JP2 = JPEG2000 file

_JP2.LBL = detached PDS label

LOLA GDRVIS 2014 Earth products have the following file names:

AVGVISIB_65p_240M_EARTHxxx

where:

AVGVISIB_65p_240M...xxx = product name from above

LOLA GDRVIS 2016 lunar products have the following file names:

AVGVISIB_nnp_rrrM_201608xxx

where:

nn = degrees of complete coverage

p = pole

N = north polar region

S = south polar region

rrr = resolution in meters per pixel

xxx = file type/extension

.IMG = image file

.LBL = detached PDS label

.JP2 = JPEG2000 file

_JP2.LBL = detached PDS label

LOLA GDRVIS 2016 Earth products have the following file names:

AVGVISIB_nnp_rrrM_201608_EARTHxxx

where:

AVGVISIB_nnp_rrrM_201608...xxx = product name from above

In ODE, GDRPSR products have one of the following product IDs:

AVGVISIB_65P_240M

AVGVISIB_65P_240M_EARTH

AVGVISIB_NNP_RRRM_201608

AVGVISIB_NNP_RRRM_201608_EARTH