Title: Seasonal Polar Temperatures on the Moon

Description:

Diviner nadir-pointing RDR data from July, 5, 2009 to Feb 17, 2019 has 
been compiled into polar stereographic maps of temperatures poleward of 
80 degrees latitude at fixed local times and fixed subsolar longitudes 
to provide an overview of diurnal temperatures of the polar regions. The 
data has been divided into winter and summer seasons, defined by the times 
of year when the subsolar latitude is above or below the equator, to 
characterize the variations in seasonal temperatures that result from the 
1.54 degree angle between the Moon's spin pole and the ecliptic plane. 

Data is provided as ascii tables, GMT-formated binaries, and png browse 
images. The ascii files contain columns of x,y distance from the pole 
normalized by radius 1737.4 km, longitude, latitude, and bolometric brightness 
temperature. Ascii files are 'sparse', meaning empty bins are excluded. 
Data is binned at 240 m/pix.

Reference:  Williams, J.-P., B. T. Greenhagen, D. A. Paige, N. Schorghofer, 
E. Sefton-Nash, P. O. Hayne, P. G. Lucey, M. A. Siegler, and K.-Michael Aye 
(2019) Seasonal polar temperatures on the Moon, Journal of Geophysical Research, 
124, 2505-2521, https://doi.org/10.1029/2019JE006028.


Directories:

pds:
  - all ascii files with detatched lbl files for PDS archive

browse_binaries:
  - browse png and gmt formatted binaries

hourly_maps:
  - hourly temperature maps - every four 0.25 hr degree fixed local time maps 
    averaged to generate 24 maps of hourly diurnal local time temperatures
  - 15 degree of fix subsolar longitude - every four 3.75 deg maps of fixed 
    subsolar longitude averaged to generate 24 maps of diurnal temperatures 

additional_maps:
  - maps derived for publication figures in Williams et al., JGR, 2019 and 
    include minimum, average, and maximum seasonal temperatures, fraction of 
    lunation below 110 K, local time of peak temperature, amplitude of temperature 
    extremes, and seasonal difference in maximum temperatures.        

24x6_240m:
  - directory + subdirectories include data and maps derived from binning
    Diviner nadir-pointing RDR data from July, 5, 2009 to Mar 15, 2020
    into 24 subsolar longitude bins and 6 Ls seasonal bins at 240 m/pixel at the pole.
    Details of the data and the provided derived maps are in Schorghofer and 
    Williams (2020).

    Reference: Schorghofer, N., and Williams, J.-P., "Mapping of ice storage 
    processes on the Moon with time-dependent temperatures", Planetary
    Science Journal, 1, 54, (2020). https://doi.org/10.3847/PSJ/abb6ff


24x6_500m:
  - directory + subdirectories include data and maps derived from binning
    Diviner nadir-pointing RDR data from July, 5, 2009 to Dec 15, 2020
    into 24 subsolar longitude bins and 6 Ls seasonal bins at 500 m/pixel at the pole.
    Details of the data and the provided derived maps are in Schorghofer et al. (2021)

    Reference: Schorghofer, N.,  J.-P. Williams, J. Martinez-Camacho, D.A. Paige, 
    and M. Sieglerr, "Carbon dioxide cold traps on the Moon", Geophysical
    Research Letters, in press (2021).