Re: Solution to create RTCM SC104 messages
From: GPS guy (ericpg_at_peak.org)
Date: 08/27/04
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Date: Fri, 27 Aug 2004 07:54:35 -0700
Ok, I understand your location. I did a project in Indonesia a few years ago
where the gov bought 200 units. Had to start from scratch with no GPS
infrastructure.
If you get away with $1,400 in your proposal and win the bid, I'd use that
price (assuming it comes with an antenna). Then when it comes to purchasing,
I think getting something for less is definitely doable...just have to be
ready to act.
Good luck on your bid!
G
>
> >I know the Novatel recvr you mention. I've used them before too...both
the
> >L1 (3151R) and L1/L2.(Millineum).
>
> Yeah, that rings a bell - I think we have a 3151 & something very
similar -
> maybe 3152 or something like that. Getting pretty old now!
>
> >You have to ask yourself what kind of quality you want. The VP Oncore is
a
> >2-5 meter quality receiver after DGPS....no better than a stable WAAS
> >solution and not much better than an autonomous solution. So to me, it
> >doesn't make a lot of sense....but I don't know your application.
>
> Well, this will be used in Borneo, so no WAAS there, though maybe the
> Japanese will get their act together in another year or so. Even when the
> MSAS satellite is up, there still aren't likely to be any reference
stations
> anywhere close to Borneo.
>
> The application is to feed RTCM SC-104 into some (10) AIS base stations,
so
> they can retransmit the corrections via AIS/GPS message 17 to all vessels
in
> the vicinity. The AIS receivers on the boats (with built-in GPS) have
specs
> saying < 5m with DGPS, so I don't need anything really fancy on the base
> stations.
>
> >The Novatel or similar quality meter-level L1 receiver starts to make
sense
> >for RTCM DGPS, but you'd be hard-pressed to find them for $500.
>
> I've been hunting around the Novatel website & found I could get prices. I
> can get the following:
>
> SA-422-CMW-BASE........White, 12-pin plastic cable mount conn, DGPS base,
1
> Hz CP output, SBAS, 9,600 bps default........$1,399
>
> US$1400 is a bit more than I'd like to pay, but it may have to do. At
least
> it gives me a price to put into the proposal, and if I find one cheaper
later
> on it will be a bonus. :-)
>
> Dave
>
>
>
> The email address used for sending these postings is not valid.
> All replies to the group please.
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