SOI Data Programs - prog:hlh

The data in this program are derived from datasets imported from the High-l Helioseismometer of the National Solar Observatory at Kitt Peak National Observatory.

***** RESTRICTION ON USE OF THESE DATA *****

These data are freely available with one restriction: If you use the data or some product based on the data in a published paper, we ask that you include an acknowledgement as follows:

NSO/Kitt Peak data used here are produced cooperatively by NSF/NOAO, NASA/GSFC, NOAA/SEL, and Bartol.

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For further information, contact Frank Hill, fhill@noao.edu

Available Processing Levels

For a general description of processing levels within the SOI database, see the SOI Datasets description.

lev1i: the calibrated Ca-K filtergrams as provided by NSO (FITS files, one per image).
Associated Data Series: monthly
lev1i_mc: same as lev1i, but corrected for the modulation transfer function to enhance spatial resolution.
Associated Data Series: same as for lev1i.
lev1.5: Level 1 datasets associated with ancillary data required for Level 2 processing.
Associated Data Series: same as for Level 1.
lev2_track: selected regions of the photosphere mapped and tracked from the images over time.
Associated Data Series: region

Available Data Series

monthly:
sample monthly: There is one series for each ``monthly'' campaign of observations, generally of 3 or 4 days' duration, but sometimes lasting a full month (or even longer). Each series is named from the calendar year in which the observing begins and a sequence number for the number of the campaign within that year, YY_N, e.g. 93_1, 93_2, etc.. Within a series, observations made on each calendar day at the observatory are collected into a data set numbered starting from the first day of observations in that series, e.g. 93_1[0], 93_1[1], etc.. Each complete Level 1 data set should normally contain roughly 500-1000 images, depending on the length of the observing day and the observing cadence.
region: There is one series for each tracked region. Each series is named from the UT day of central meridian passage of the center of the region and the heliographic coordinates of the center of the region, YYMMDD_±BB_LLL. Each Level 2 data set contains a single 3-dimensional data cube.

This page last revised 14 December, 1995.

Please address comments and questions to Rick Bogart, SOI Data Scientist

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