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The Digital Prominence Monitor (DPM) is a telescope with a removable occulting disk used to make observations of the limb or disk in Hydrogen-alpha (wavelength 656.3nm) light.
Data from the DPM is used in conjunction with that from many other instruments including coronal data from MK3 and Helium I data from CHIP also located on Mauna Loa.
If you would like to obtain some of the DPM data, images are available through our anonymous ftp site. The images are composites of the limb and disk for a particular day and and available in gif format with "fits" format files available via special request. Images are located in subdirectories of yyyy/mm_mmm such as: 1995/01_jan.
Typical images are named as follows:
95d023.1832L.2114D.gif
In the example above, the limb image was taken at 18:32 UT and the disk
image was taken at 21:14 UT. Some images may have data across the date
boundary such as:
94d346.2051L.0140D.gif
in which the limb image was taken at 20:51 UT on DOY 346, 1994 and the
disk image
at 01:40 UT on DOY 347, 1994.
Logs by the observers are also available in the dpm/logs directory. These are ascii files with typical names of yydDOY.log (i.e. 94d198).
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