CSPP software update for the Jan 1, 2017 leap second update

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kathys
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Joined: Tue Jun 22, 2010 4:51 pm

CSPP software update for the Jan 1, 2017 leap second update

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CSPP software update procedure to handle the Jan 1, 2017 leap second update

On 1 January 2017, a new leap second adjustment will be made to Coordinated Universal Time (UTC). These are occasionally inserted into the atomic scale of reckoning time in order to bring it into line with solar time. A consequence of this change is that several Community Satellite Processing Package (CSPP) software packages require a Leap Second file update.

Follow this procedure to update your CSPP software to handle the Jan 1, 2017 leap second update. We strongly recommend updating your CSPP software. Failure to do so may result in offset granule boundary times and navigation after the leap second correction has been made to UTC time.

1. Download and extract the CSPP leap second update utility:

wget ftp://ftp.ssec.wisc.edu/pub/CSPP/leapse ... 016.tar.gz
tar -zxf cspp_leapsec_update_2016.tar.gz
cd cspp_leapsec_update_2016

2. Run the update script as shown below for directory path(s) containing any of the following CSPP software packages:

SDR
VIIRS EDR
VIIRS Imagery EDR
NUCAPS
MIRS (v2.0 only)
ACSPO (v1.1 only)


./cspp_leapsec_update_2016.bash $HOME/CSPP # (replace $HOME/CSPP with your install path)

The script will search the supplied directory path and update relevant files when the user approves the update by entering 'y', followed by the enter key. Write permission is needed in the installation directory.

The script may be run more than once if desired, and it will report files which are already up to date.

Finally, if you use the NASA Direct Readout Lab (DRL) Real-time Software Telemetry Processing System (RT-STPS) Version 5.8 or earlier to produce VIIRS, ATMS or CrIS Raw Data Records (RDRs), we advise that you do not update the leap second file in this software package (leapsec.dat) until after 00 UTC on 1 January 2017. Doing so may result in time and navigation errors.

Please feel free to contact us with any comments or questions you may have.
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