[ntp:questions] how do you like the Trimble Resolution T
Richard B. Gilbert
rgilbert88 at comcast.net
Wed Feb 29 21:23:51 UTC 2012
On 2/29/2012 12:45 AM, Ron Frazier (NTP) wrote:
> Hi all,
> Is anyone using the Trimble Resolution T GPS for timing? I was looking
> at an ad for one on ebay. For my purposes, any accuracy under 1 ms is
> great. I don't have to have 15 ns. Of course, smaller numbers are always
> better. Is this device hard to setup and program for PPS and use with
> NTPD? What accessories are needed?
> This is what the ad says is included:
> quote on ->
> The Resolution T Starter Kit provides everything you need to start
> integrating the module into your application. The kit includes an
> active, external 5-VDC Bullet-style antenna
> 50 feet of RG-59 cable, and an AC/DC power adapter. The starter kit
> enclosure includes a mother board that provides serial output, and a
> serial interface cable. A reference manual and monitor programs are
> provided on CD-ROM.
> <- quote off
> I notice the unit only tracks 12 satellites and has 141 dbm sensitivity,
> which seems to be less than some units. Is that a problem?
ISTR that only three satellites are required to determine the location
of your antenna. Once this position is accurately known, you can live
with a single satellite.
The last time I heard there were something like 27 GPS satellites in
service. There are usually something like 8 satellites above the
horizon. Enough for most purposes!
> Finally, what is sawtooth correction?
More information about the questions