LRO LOLA Gridded Data Record Albedo Map

GDRDAM – Gridded Data Record Albedo Map

Instrument: Lunar Orbiter Laser Altimeter

PDS Data Set ID: LRO-L-LOLA-4-GDR-V1.0DOI: 10.17189/1520642

PDS4 Bundle:urn:nasa:pds:lro_lola_rdrDOI: 10.17189/tnyt-7007

LRO PDS3 to PDS4 Migration Status: Complete

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

For more information about the LOLA PDS3 volume, see the LOLA Archive Volume SIS.

The Lunar Orbiter Laser Altimeter (LOLA) Gridded Data Record Albedo Map (GDRDAM) data products are map-projected albedo maps (brightness). The products are derived from nominal mission data only (e.g. Lunar Reconnaissance Orbiter (LRO) nominal phases 1-13). The GDRDAM data products contain the binned, interpolated altimetric measurements on a uniformly-spaced grid.

A pixel in the GDRDAM product represents the mean value at the center of a region bounded by lines of constant longitude and latitude at integral numbers of degrees or fractions thereof, scaled and interpolated where necessary. The size of the products at higher resolutions requires that they be aggregated in subsets of global coverage. Global standard products use the Equirectangular map projection, also known as Simple Cylindrical, while the higher-resolution products afforded by dense polar coverage use the Polar Stereographic projection.

Equirectangular map-projected digital elevation models

Product

Pixel size (latitude)

Number/size of tiles

Bits per pixel

LDAM_4

7.5808 km

Global, 0-360

16

LDAM_8

3.7904 km

Global, 0-360

16

LDAM_10

3.0323 km

Global, 0-360

16

Polar map-projected digital elevation models (or digital elevation counts: LDAC), N/S

Product

Dimensions

Pixel size

Latitude range

Bits per pixel

LDAM_50S_1000M

2532 x 2532

1000 x 1000 m

+/- 50° to pole

16

LDAM_50S_3000M

844 x 844

3000 x 3000 m

+/- 50° to pole

16

LOLA GDRDAM products have the following file names:

productsuffix

where:

product = product name above

suffix = file type/extension

_FLOAT.IMG = floating point image file

.LBL = detached PDS label

.JP2 = JPEG2000 file

_JP2.LBL = detached PDS label

In ODE, GDRDAM products have the following product IDs:

PRODUCT_FLOAT