W4/VP9KF - STEREO-B locator

W4/VP9KF

W4/VP9KF

F:136 A:6 K:2 SSN:114 WWV Log

VP9KF home

Last reload: 2012-05-18 17:44:12Z

Latest WWV data: 2012-05-18 17:30:01Z

Data policy

STEREO-B position reporter (under construction, please come back later)

Bug fixes: none pending
RELEASED CODE! STEREOB v0.4 Last Updated: 2012-02-03 18:40:55Z

Use the following code that's written here.
Place the following in your cron file (only needs to be fetched once per day):

0 0 * * * /usr/bin/fetch -q -A -T 10 -o $YOURDIR/stereo.txt 'http://stereo.gsfc.nasa.gov/where/where_is_stereo.shtml' > dev/null

[where $YOURDIR is the variable set to your chosen directory, which is set at the beginning of your cron file].
Caution! Cron and command syntax varies between *NIX versions - the above is from FreeBSD.

The PHP code is located here. It can be included using SSI.

FAQ
Q: Why didn't you calculate it from orbit injection?
A: The mathematics are complex and using the real STEREO site data seemed potentially more accurate.
Q: Is absolute calculation an option?
A: Yes, you'll see some commented-out key timeline variables for future use, if required.

Released under GPLv3 Licence.