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- ----------------------------------
- DOCUMENTATION FOR PROGRAM 'UPDATEK'
- ----------------------------------
-
- Version 1.00 - Copyright 1992
- Solar Terrestrial Dispatch
-
-
- All of the planetary A and K index data supplied with the daily SGDB
- reports are compiled using a limited number of magnetic observatories around
- the world. As a result, the planetary A and K indices are only preliminary
- values and are not as accurate as they would be if they were based on data
- from many other observatories.
-
- Fortunately, the daily SGDB reports also contain a set of planetary A
- and K indices that were observed 26 and 27 days ago (corresponding to the
- SGDB acronyms "27DAY-AP" and "27DAY-KP"). These values are included in the
- daily SGDB reports to permit analysis of possible imminent recurrent
- tendencies based on a solar rotational cycle of approximately 27-28 days.
-
- These planetary A and K indices that were observed 26 and 27 days ago
- are corrected values that are based on a larger set of data from other
- magnetic observatories around the world. They can therefore be used to
- correct the preliminary planetary A and K indices in your BCAST-maintained
- database file.
-
- In other words, UPDATEK simply updates the planetary A and K indices
- contained in your database file to more accurate values using the corrected
- planetary A and K indices that were observed 26 and 27 days ago.
-
- To invoke UPDATEK, simply type:
-
- updatek
-
- on your DOS command line. There are no command-line parameters or options
- required to execute this program.
-
- Upon execution, UPDATEK runs through the entire database and searches
- for inaccurate planetary A and K-indices. When it finds inaccurate values,
- UPDATEK shows you the dates of these inaccurate records and modifies them
- accordingly. A continually updated percentage value is also reported so you
- can monitor the progress of UPDATEK.
-
- When you first execute UPDATEK, you will notice a large number of values
- in your database file being modified (assuming your database is up-to-date).
- This is normal.
-
- It is recommended you execute UPDATEK at least once per month in order
- to maintain an accurate set of planetary indices, although you can execute
- UPDATEK as frequently or infrequently as you wish.
-
- Note that UPDATEK only modifies values at least 27 days old. It will
- not modify values from recently issued SGDB reports that are less than 27
- days old, since it uses the 27DAY-AP and 27DAY-KP values from the SGDB
- reports.
-
- UPDATEK does not touch the Boulder A or K indices. These values are
- usually accurate and should not need to be modified.
-
-