KPLO ShadowCam Derived Data - UMOS (Uncontrolled Mosaic)

UMOS – Uncontrolled Mosaic

PDS4 Bundle: urn:nasa:pds:kplo-shadowcamDOI: 10.17189/y89z-kt98

High-resolution UMOS (Uncontrolled Mosaic) is composed of ShadowCam images typically acquired on sequential orbits, either on a single day or across a short range of days. Using spacecraft positioning data, the images are calibrated and map-projected to the best available LOLA LDEM at a pixel scale of at least 30 m/px or better. If this is not possible, the images are map-projected to the SLDEM2015. The absolute positional accuracy of these images is estimated to be within 60 m, as described in (Wagner et al., 2024). In these images, shadowed areas are visible if lit by light reflected from nearby surroundings, while sunlit areas are saturated.

ShadowCam UMOS data and related products have the following file names:

shadowcam_Tmosaic_feature##_AyyyBzzz_ssss_tttt<_sup>.ext

where:

shadowcam = a ShadowCam product

T = type of mosaic

u for uncontrolled mosaics

c for controlled mosaics

collar for collar mosaics

feature = the feature name

## = incremental index number for distinguishing multiple mosaics of the same feature or PSR ID (starts at 01 for that mosaic type)

A = projection type

e for equirectangular,

p for polar stereographic

o for orthographic

yyy = center latitude to the nearest tenth of a degree

B = n for northern hemisphere, s for southern hemisphere

zzzz = center longitude to the nearest tenth of a degree. The longitude domain for ShadowCam controlled mosaics is 360 positive east.

ssss = local polar 'season'. Summer is defined as above 1.0 sub-solar latitude for the northern hemisphere, and below -1.0 sub-solar latitude for the southern hemisphere. Winter is the same definition as summer, but the hemispheres are switched. Spring occurs between the end of winter and start of summer, and fall occurs between the end of summer and start of winter.

tttt = local lunar time of day relative to the center longitude of the mosaic. The local time of other locations within the mosaic may vary widely due to the rapidly changing longitude near the poles. 6 AM is sunrise, 6 PM is sunset, from 6 PM to 6 AM is night, and from 6 AM to 6 PM is daytime. Calculated using the difference between center longitude and sub-solar longitude. The time is rounded to the nearest hour, and converted from the 24-hour clock (00-23) to the 12-hour clock (12am - 11pm).

_sup = indicates the supplemental product

_5m and _20m indicate the pixel scale in meters

_cog indicates COG - pyramidal product files

_images indicates the list of images names used in this mosaic

_readme indicates the readme file.

ext = file extension for associated products

cub = ISIS cube files

tif = tif image files

txt = text files

xml= PDS4 XML labels

In ODE, ShadowCam UMOS data products have the following product IDs:

shadowcam_umosaic_feature##_AyyyBzzz_ssss_tttt<_sup>

More information about the ShadowCam UMOS data products can be found in the following documents:

Wagner, R.V., et al. Cartographic Accuracy of ShadowCam Images, 2024 LPSC LV, Abs. #2357. https://www.hou.usra.edu/meetings/lpsc2024/pdf/2357.pdf.
LROC PSR Atlas: https://lroc.im-ldi.com/atlases/psr.
Manheim, M.R., Henriksen, R.V., Wagner, C.H., Michaud, and the ShadowCam Team,., ShadowCam Digital Terrain Models Of Permanently Shadowed Regions, 2024 LPSC LV, Abs. #1294.
Henriksen M.R., Manheim M.R., Grieser S.A., Carr N.F., Brown H.M., Collins1 W.M., Wagner RV., and Robinson M.S., ShadowCam Derived Mosaics, Digital Terrain Models, And Other Products, 2025 LPSC LVI, Abs. #2571.
Grieser, S. A., Henriksen, M. R., Wagner, R. V., Mahanti, P., Manheim, M. R., & Robinson, M. S. (2024), Investigation of Lunar Polar Regions Using ShadowCam Mosaics. In 45th Committee on Space Research Scientific Assembly, Busan, South Korea, 13-21 July 2024 (Abstract B3.1-0010-24). https://app.cospar-assembly.org/2024/browser/presentation/35177.