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Diffstat (limited to 'astro/dgpsip/pkg-descr')
| -rw-r--r-- | astro/dgpsip/pkg-descr | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/astro/dgpsip/pkg-descr b/astro/dgpsip/pkg-descr new file mode 100644 index 000000000000..4ba900f651dd --- /dev/null +++ b/astro/dgpsip/pkg-descr @@ -0,0 +1,22 @@ +On a stationary GPS without a differential correction signal, you +should see a 20m average radius "drunken walk" pattern. On the same +receiver with DGPS corrections and a good view of the sky, the +error the same receiver with DGPS corrections and a good view of +the sky, the error should be reduced to approximately 2m average +radius. If you've always wanted to know exactly where your house +is located without that annoying GPS "wander," but didn't want to +spend the money for a DGPS radio, here is your big chance! + +I'd like to announce a fun DGPS hack. I've written a small Un*x +server and client for redistributing DGPS correction signals over +the Net. Basically the server grabs the serial byte stream from my +DGPS radio and sends it off over a TCP connection. The client does +the same thing but in reverse. The result is that you can receive +the local DGPS corrections from absolutely anywhere by using the +Internet as the world's largest extension cord. You'll still need +to be within 1000 miles or so of San Francisco, California, USA +for best results. However chances are better than not that the GPS +error will stillb e reduced if you are 2000 to 3000 miles away. +Several respondents from 2000 miles away have noted that the remote +differenential signals have diminished the SA induced position and +velocity errors by approximately 3x. |