[time-nuts] adafruit $40 GPS
lists at rtty.us
Tue May 14 19:09:41 EDT 2013
A lot of the low cost pps receivers do not have position hold at all. That makes the whole survey process a bit less important.
On May 14, 2013, at 6:22 PM, Chris Albertson <albertson.chris at gmail.com> wrote:
> OK, not useless, just an order of magnitude worse than something that
> cost less than 1/2 the price. But you are right that many people only
> care about hundredths of seconds.
> The main problem with the nav receivers is they don't do a self survey
> so there is some position uncertainty. But that only applies if you
> care about nanoseconds.
> On Tue, May 14, 2013 at 12:48 PM, Bert, VE2ZAZ <ve2zaz at yahoo.ca> wrote:
>> Why should a navigation GPS be useless for timing? A lot of people use Oncore GT+ GPS's with satisfactory results. In the end, it all depends on the performance you expect from your system...
>> Bert, VE2ZAZ
>> Date: Tue, 14 May 2013 09:02:17 -0700
>> From: Chris Albertson <albertson.chris at gmail.com>
>> To: Discussion of precise time and frequency measurement
>> <time-nuts at febo.com>
>> Subject: Re: [time-nuts] adafruit $40 GPS
>> <CABbxVHuo5uPb7OXj7bbrvcuZWdxZm9GExngS90N9N2iC3DUGgQ at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>> The adafruit GPS has a built in antenna. But you can add an external one.
>> But why use this for timing? They don't even give a spec for timing
>> accuracy and it is likely NOT a timing GPS. It is a navigation unit.
>> Pretty much useless for timing.
>> Also the price is to high. You can do better in eBay, real timing
>> units sell for as little as $15.
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> Chris Albertson
> Redondo Beach, California
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