From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ip-64-139-1-69.sjc.megapath.net (ip-64-139-1-69.sjc.megapath.net [64.139.1.69]) by huchra.bufferbloat.net (Postfix) with ESMTP id 727C2200BFD for ; Wed, 2 May 2012 14:19:36 -0700 (PDT) Received: from shuksan (localhost [127.0.0.1]) by ip-64-139-1-69.sjc.megapath.net (Postfix) with ESMTP id 9EAE180003B; Wed, 2 May 2012 14:19:35 -0700 (PDT) X-Mailer: exmh version 2.7.2 01/07/2005 with nmh-1.3 To: "Gary E. Miller" From: Hal Murray In-Reply-To: Message from "Gary E. Miller" of "Wed, 02 May 2012 13:13:10 PDT." <20120502131310.7dd7f799.gem@rellim.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 02 May 2012 14:19:35 -0700 Message-Id: <20120502211935.9EAE180003B@ip-64-139-1-69.sjc.megapath.net> Cc: thumbgps-devel@lists.bufferbloat.net, hmurray@megapathdsl.net, gpsd-dev@nongnu.org, tz Subject: Re: [Thumbgps-devel] [gpsd-dev] PPS over USB X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 May 2012 21:19:36 -0000 gem@rellim.com said: > Looking for that check in the gpsd code, I do not see it in the PPS path or > in the NMEA path. I wonder when that disappeared? That may explain some > things... I'll go add that back in now. I think there is another piece of fine print in that area. I'm not sure where I saw it, probably one of the Garmin docs. The idea is that you can't trust the first few seconds of data when it switches from not-enough satellites to enough. I've seen it give bogus position (way off) marked as valid. I think they all happened right after recovering from not-enough-satellites. I'll scan log files if anybody wants examples. -- These are my opinions, not necessarily my employer's. I hate spam.