I have GPS without position hold, I wonder how precise 1PPS, which I want
to use for disciplined OCXO.
You do not know how GPS with position hold calculates the measured
coordinates vs know the real coordinates of the expected error timestamps 1
pps?
Thansk for information
Hi
A GPS that uses position hold gets it's coordinates from one of two possible
sources:
1) You measure the actual antenna location with a precision survey grade GPS
and enter them.
--or--
2) The GPS does a survey for some amount of time. It averages it's own
reasonable location estimates over
On 3/13/13 7:06 AM, Bob Camp wrote:
Hi
A GPS that uses position hold gets it's coordinates from one of two possible
sources:
1) You measure the actual antenna location with a precision survey grade GPS
and enter them.
--or--
2) The GPS does a survey for some amount of time. It averages it's
I have a Thunderbolt and a Zypher Nanosync II GPSDO, both of which put out 5
V. The typical EBAY Marine GPS Antenna is not voltage labeled, but since
it died after a few hours, I assume it was 3 volt. Any suggestions on a mod
to either unit to change the feed to 3 volt, or suggestions on a
Hi
There are a ton of timing GPS antennas on the usual auction sites. Cone
shaped or mushroom shaped white plastic enclosures. Mast mount with a coax
connector on the bottom (occasionally a pigtail). They generally sell for
less than $30.
I've never seen one of the sub $30 ones that wanted
Well of course you are correct. My mushroom is fine,
Wish I could say the same for the connector/adaptors I used on the way to
the mushroom.
All is fine now after reseating connectors.
Lester B Veenstra MØYCM K1YCM W8YCM
les...@veenstras.com
US Postal Address:
5 Shrine Club Drive
HC84 Box
On Wed, Mar 13, 2013 at 6:03 AM, hutt...@seznam.cz wrote:
I have GPS without position hold, I wonder how precise 1PPS, which I want
to use for disciplined OCXO.
THere is more difference between brands and models of GPS receivers.
Accuracy of the pPS can vary over a factor of 1000.But the
Hi Peter:
I've been told that the 150 and 400 MHz signals are still active and that in the past week or so the timing signals on
those frequencies from geostationary satellites (not the low orbit nav sats) are being used by some hacked Chinese cell
phones to determine position to about 1
Hutta,
to sum up for you: as you have read, position hold doesn't mean precise
PPS, only the ability to determine the PPS (the time) with less than 4
satellites, downto only one. Timing grade receivers have better internal
oscillators and give better PPS always, either in position hold or not.
On 3/13/2013 13:15, Azelio Boriani wrote:
Then you will start to
appreciate things that will lead you to a timing receiver with the sawtooth
correction.
For what it's worth: I have been evaluating the NEO-6M, a navigation
receiver, for use in a NTP server which I have posted here in the past.
Good,
so we can see that position hold - can use down to one satellite, sawtooth
correction - we can squeeze the most out of the PPS precision, whatever
receiver (navigation/timing/other) we have. Good to know that the NEO-6M
navigation receiver has the sawtooth correction.
On Wed, Mar 13, 2013
Some of the little magnetic attached antennas on eBay will operate on 3-5V.
More problematic is using the older antennas which require 5V with the newer
chips such as the LEA-5,6,7 series which run on 3.3V. There is an internal
Bias T, but I haven't tried to bring in 5V through the Vant pin
NEO-6M buy for less than $ 10 including shipping from China,
NEO-6T is unfortunately expensive, and frankly I do not know who sells it
for at least a little reasonable prices.
Difference between M and T
- T supports fixed position
- T has TXO
Finally, the price at T version comes inadequate
I
On 3/13/2013 6:40 PM, lstosk...@cox.net wrote:
Some of the little magnetic attached antennas on eBay will operate on
3-5V. More problematic is using the older antennas which require 5V
with the newer chips such as the LEA-5,6,7 series which run on 3.3V.
Some distribution amps will all you to
On 3/13/2013 5:19 PM, Mike S wrote:
On 3/13/2013 6:40 PM, lstosk...@cox.net wrote:
Some of the little magnetic attached antennas on eBay will operate on
3-5V. More problematic is using the older antennas which require 5V
with the newer chips such as the LEA-5,6,7 series which run on 3.3V.
On Wed, 13 Mar 2013 10:17:30 -0700, Chris Albertson
albertson.ch...@gmail.com wrote:
On Wed, Mar 13, 2013 at 6:03 AM, hutt...@seznam.cz wrote:
I have GPS without position hold, I wonder how precise 1PPS, which I want
to use for disciplined OCXO.
THere is more difference between brands and
On 03/13/2013 09:05 PM, David wrote:
This brings up something that I have wondered about for a while.
The Garmin GPS18x (and many other receivers) specify the PPS output as
within 1uS but does that mean it wanders around over say 12 or 24
hours within 1uS of GPS Time or does it mean something
On Wed, 13 Mar 2013 23:07:01 -0400, Michael Tharp
g...@partiallystapled.com wrote:
On 03/13/2013 09:05 PM, David wrote:
This brings up something that I have wondered about for a while.
The Garmin GPS18x (and many other receivers) specify the PPS output as
within 1uS but does that mean it
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