[AR] Re: GPS question for the group...

  • From: qbert@xxxxxxxxxxxxxxx
  • To: arocket@xxxxxxxxxxxxx
  • Date: Mon, 28 Dec 2015 02:33:32 -0700

Monroe

You missed the part in there that says,

ENVIRONMENTAL
Temperature Operating -40°C to +85°C
Storage -40°C to +95°C
Humidity 95% non-condensing
Vibration (operating)
Random MIL-STD 810G (7.7 g RMS)
Sinusoidal IEC 60068-2-6 (5 g)
High Vibration Option MIL-STD 810G (20 g RMS)
Acceleration (operating) MIL-STD 810G, Method 513.6
Procedure II (16 g)
Bump ISO 9022-31-06 (25 g)
Shock
Operating MIL-STD 810G (40 g)
Survival (75 g)

which sort of does fix the problem depending on what standard you want to use.

Robert

At 10:21 PM 12/27/2015, you wrote:

That wont solve issue #2 > -------- Original Message -------- > Subject: [AR] Re: GPS question for the group... > From: Ben Brockert <wikkit@xxxxxxxxx> > Date: Sun, December 27, 2015 9:57 pm > To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx> > > > Been part of getting a Novatel receiver without COCOM, it's just a form > promising not to export and an extra $1k. No government contract needed. > Can even take the limit off an existing installed unit, since it's just a > software update. > > On Sunday, December 27, 2015, Paul Breed <paul@xxxxxxxxxx> wrote: > > > This is going to be a 2 to 10K GPS reciever. > > > > Its also going to be difficult to get one without COCOM limits without a > > government contract. > > > > Paul > > > > On Sun, Dec 27, 2015 at 8:01 PM, David Gregory <david.c.gregory@xxxxxxxxx > > <javascript:_e(%7B%7D,'cvml','david.c.gregory@xxxxxxxxx');>> wrote: > > > >> I'm guessing you've already looked into novatel. What do they run? > >> This guy is 16g operating on the spec sheet. > >> > >> http://www.novatel.com/assets/Documents/Papers/OEM638-PS-D17916.pdf > >> > >> > On Dec 27, 2015, at 1:45 PM, Paul Breed <paul@xxxxxxxxxx > >> <javascript:_e(%7B%7D,'cvml','paul@xxxxxxxxxx');>> wrote: > >> > > >> > There are two GPS limits that matter. > >> > > >> > 1)The COCOM limits that limit altitude and speed.... > >> > > >> > 2)The acceleration limits that cause the GPS to loose lock. > >> > > >> > > >> > What GPS modules and types have been shown to work reliably during > >> boost for accelerations > 6 to 10 g in the HPR community. > >> > I'm looking for modules that don't exhibit problem #2, as problem #1 is > >> a political problem that might be solved if the basic > >> > underlying technology does #2 well.... > >> > > >> > > >> > has anyone flown the really tiny Venus GPS modules on a rocket? > >> > > >> > > >> > Paul > >> > > >> > > >> > > >> > >> > >


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