Hello All,
Does anyone know yet of any companies that are making GPS-III receiver
chip-sets/modules yet?
Some web-sites on GPS-III:
http://www.gps.gov/systems/gps/modernization/
http://www.gps.gov/systems/gps/modernization/civilsignals/
On Thu, 24 Jul 2014 00:14:10 -0700
John C. Westmoreland, P.E. j...@westmorelandengineering.com wrote:
Does anyone know yet of any companies that are making GPS-III receiver
chip-sets/modules yet?
Do you mean a L1 C/A / L2C receiver? I am not aware of any.
AFAIK all dual band receiver are
Hi all!
Have a Datum ts2100 that had a failed gps receiver. Found a replacement as
a new clone. The ts2100 with the new receiver does not set the right
time, however, it does know where it is, reports the gps firmware version
and gives satellite information. Prior to this, the only message that I
Tom, I'd forgotten about those tests (time flies!). I strongly suspect
that the bulk of the tempco is from the BPF rather than the
transformers. I've been recommending against install the filter unless
its really needed, for this very reason.
I'll try to do some tempco measurements of one
On 7/20/2014 6:41 AM, John Miles wrote:
I often find that when I use coaxial baluns to cut down on ground loop
noise, I end up with more noise and interference than I started with. Not
always, but often enough that I'm leery of them.
Due to skin effect, most signal propagation in a coaxial
GPS-III is the wrong term. You mean block three spacecraft.
The Air Force is buying 8 new satellites they are calling block III
and they don't launch until at least 2016. If the current satellites
are in good health they could delay the launch. If the past is a
guide to the future the
The data and tests presented in this source:
http://www.cliftonlaboratories.com/imd_in_broadband_transformers.htm
is a great resource on measured large-signal performance of
binocular/toroidal transformers. One factor found that can really degrade
IMD performance it turns out, is not the
Chris,
I disagree only with your statement as a GPS user you'd never know.
As stated in one of John's references:
The government is in the process of fielding three new signals designed for
civilian use: L2C, L5, and L1C. The legacy civil signal, called L1 C/A or
C/A at L1, will continue
I think you can buy multi-frequency receivers. Remember GPS is not longer
the only system. There are stelites from the US, Europe, Russia, China and
Japan.Adding more more frequencies allows the receiver to detect multi
path and makes it harder to jam but the timing is not greatly
Hi Tom,
I think that an offline conversation with Dusty Morris may have pointed out the
root cause. The SSR-6tru board uses 3V logic, but the Motorola Oncore boards
use 5V. So the Synergy M12 adapter has to do the level shifting to protect the
receiver. It does this for input signals by
On eBay the RNY25A1 receiver module sells for $15 and $1 for shipping
from Taiwan. Supposedly, it does GPS and Glonass. There is a link to a data
sheet there as well. Might be interesting to play with one and compare the
results. Stick it in a Tupperware box and nail it to a fence post.
On Thu, 24 Jul 2014 10:30:07 -0700
Michael Perrett mkperr...@gmail.com wrote:
The government is in the process of fielding three new signals designed for
civilian use: L2C, L5, and L1C. The legacy civil signal, called L1 C/A or
C/A at L1, will continue broadcasting in the future, for a total
Try http://navspark.mybigcommerce.com/. A bit more expensive ($25) but comes
with a processor embedded. There is also a GPS+Beidou flavor.
Edésio
(sorry if duplicated)
On Thu, Jul 24, 2014 at 05:10:35PM -0500, Al Wolfe wrote:
On eBay the RNY25A1 receiver module sells for $15 and $1 for
Hi!
Try http://navspark.mybigcommerce.com/. A bit more expensive ($25) but comes
with a processor embedded. There is also a GPS+Beidou flavor.
Edésio
On Thu, Jul 24, 2014 at 05:10:35PM -0500, Al Wolfe wrote:
On eBay the RNY25A1 receiver module sells for $15 and $1 for
shipping from Taiwan.
I have purchased about a dozen of these receivers (mostly the RS-232 version
for $1 more). Reyax ships very fast. I get them in about 1 week.
They work well, and are based upon the Ublox MAX-7C. They output independent
GPS and Glonass NMEA messages and don't appear to merge the two systems
Hello,
While not really monolithic, I have found L1/L2 receivers (mostly for
navigation, but also in timing flavor) rather well integrated, especially from
Novatel and Javad. Sadly, their websites don't mention prices.
Regards,
Jean-Louis Oneto
Envoyé depuis un mobile Samsung
The uBlox Max-7Q seems to be able to merge GPS and GLONASS for navigation, but
the manual says explicitly that it must be avoided for timing, the delay of the
PPS from GLONASS being not calibrated (plus various problems related to
timescales).
Regards,
Jean-Louis Oneto
Envoyé depuis un
On 7/24/2014 9:37 AM, Tim Shoppa wrote:
The data and tests presented in this source:
http://www.cliftonlaboratories.com/imd_in_broadband_transformers.htm
is a great resource on measured large-signal performance of
binocular/toroidal transformers. One factor found that can really degrade
IMD
Hi
If you go looking for them on the auction sites, the RYN25DI from Reyax is the
search item for the RS-232 version. The RYN25AI is the search item for the not
RS-232 version.
Bob
On Jul 24, 2014, at 7:15 PM, Mark Sims hol...@hotmail.com wrote:
I have purchased about a dozen of these
How good is the built-in antenna? Do they work well in doors away from windows?
The $15 price, low power and 2.5 meter CEP are attractive. They are
1/2 the price of something else I was looking at. I'd be using them
for navigation, not timing.
On Thu, Jul 24, 2014 at 5:57 PM, Bob Camp
I received a little package with a GPS receiver + antenna from Gentleman
[H6m] and I would like to tel him thank you very much
73
KJ6UHN
Alex
On 7/24/2014 5:57 PM, Bob Camp wrote:
Hi
If you go looking for them on the auction sites, the RYN25DI from Reyax is the
search item for the RS-232
They seem to do pretty well. I have mine in devices sitting on my kitchen
floor. It is downstairs in a stucco over wire mesh house. Nearest window/door
is 20 feet away... and it is shaded by a stainless steel covered bridge to the
guest house. Also lots of stainless in the kitchen... they
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