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             Help notes for modis_update_utcpole_leapsec.csh
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Usage: modis_update_utcpole_leapsec.csh [OPTIONS]

Options:

  -quiet                Don't print any messages unless an error occurs
  -verbose-ftp          Enable verbose auto-download messages
  -retries n            Number of times to retry a failed download

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The modis_update_luts.csh script downloads current utcpole.dat and
leapsec.dat files from an ftp server, replacing the existing files in the
$SEADAS/var/modis/ directory. These files are required for MODIS
geolocation processing and it is suggested that they be updated once per
week using a cronjob. This script can also be run manually at any time.

If the script's -quiet mode is invoked, messages are only written to
stdout in the case of an error, which avoids unnecessary emails when the
script is run as a cronjob. It is recommended to run this script as a
weekly cronjob. Remember to invoke a shell to run the script within cron
in order to set the MODISL1DB environment variables. Example weekly
crontab line for csh shell users:

0 0 * * 0 /bin/csh -c "/path_to_scripts/modis_update_utcpole_leapsec.csh -quiet"


See http://oceancolor.gsfc.nasa.gov/seadas/doc/toplevel/anc_info.html#UTCPOLE
for more information on the utcpole.dat and leapsec.dat files.

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Explanation of command line arguments:
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-quiet (optional)
No messages are printed to stdout unless an error occurs.

-verbose-ftp (optional)
Enable verbose wget output messages for all downloads.

-retries n (optional) (default=4)
Number of times to retry failed download before giving up. The wget ftp
client uses linear backoff, waiting 1, then 2, then 3 seconds, etc. after
each attempt.

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