From: Jon Clarke Date: 28 Jul 1999 11:15:59 Subject: [IGEXMail-0422] NPLC phase discontinuities Precedence: bulk ****************************************************************************** IGEX Electronic Mail 28-Jul-1999 11:15:59 Message No 0422 ****************************************************************************** Author: Jon Clarke Subject: NPLC phase discontinuities ------ =_NextPart_000_01BED8DD.C4BC4F40 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Dear Colleagues,=20 yesterday we discovered that the NPLC R100 receiver has had hourly = resets of its L1 and L2 phase measurements, occuring every hour since we = started logging in October. This is obviously of great concern to us = because it breaks all continuity in the phase measurements. This was = discovered during our first in-depth analysis of the receiver's data.=20 This message is to inform you all that we are changing our logging from = hourly logging of the raw data via the serial port, followed by a daily = conversion, to daily downloads of the complete Rinex file. My hope is = that this will eliminate the problem, and hopefully simplify some other = matters too. This may cause some disruption while the change is = executed.=20 I have contacted 3S Navigation to query the cause of these resets. My = apologies for the late discovery of this problem.=20 Regards, Jon Clarke ------------------------------------------------------------------------ Mr Jon Clarke Time and Frequency Section, jon.clarke@npl.co.uk Centre for Electromagnetic and Time Metrology, tel: +44 (0) 208 943 6548 National Physical Laboratory, fax: +44 (0) 208 943 7138 Queens Road, Teddington, TW11 0LW, U.K. ------------------------------------------------------------------------ ------ =_NextPart_000_01BED8DD.C4BC4F40 Content-Type: application/ms-tnef Content-Transfer-Encoding: base64 eJ8+IhUIAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQSQBgDoAAAAAQAAAAwAAAADAAAwAgAAAAsADw4AAAAAAgH/DwEA AAAcAAAAAAAAANl0fUIochHPqC0AQDMkuqcCBgEAkwAAAB4AAjABAAAABQAAAFNNVFAAAAAAHgAD MAEAAAAVAAAAaWdleG1haWxAZW5zZy5pZ24uZnIAAAAAAwAVDAEAAAADAP4PBgAAAB4AATABAAAA CQAAAElnZXhNYWlsAAAAAAIBCzABAAAAGgAAAFNNVFA6SUdFWE1BSUxARU5TRy5JR04uRlIAAAAD AAA5AAAAAAsAQDoBAAAAAgH2DwEAAAAEAAAAAAAAAhIgAQSAAQAbAAAATlBMQyBwaGFzZSBkaXNj b250aW51aXRpZXMA3AkBBYADAA4AAADPBwcAHAAJACwAFAADAEUBASCAAwAOAAAAzwcHABwACQAs ABQAAwBFAQEJgAEAIQAAAEI2NTk0QzVGQ0Q0NEQzMTE5Q0UwMDBDMDRGOTVBQUQ3AEkHAQOQBgCQ AAAACgAAAAsAIwAAAAAAAwAmAAAAAAALACkAAAAAAEAAOQCADlBi1di+AR4AHgwBAAAABQAAAFNN VFAAAAAAHgAfDAEAAAAVAAAAam9uLmNsYXJrZUBucGwuY28udWsAAAAAQAAHMIAOUGLV2L4BQAAI MIAOUGLV2L4BHgA9AAEAAAABAAAAAAAAAAMADTT9NwAARhg= ------ =_NextPart_000_01BED8DD.C4BC4F40--