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<div class="moz-text-flowed" style="font-family: -moz-fixed;
font-size: 14px;" lang="x-unicode">Dear IGS colleagues,
<br>
<br>
The absolute IGS antenna correction file (igs14_wwww.atx) has been
<br>
updated. The new release is called 'igs14_1992.atx'. It contains
<br>
the following changes:
<br>
<br>
1) According to NANU 2018010, Block IIA satellite SVN34 has
resumed<br>
transmitting L-band utilizing PRN18 on approximately 8 March 2018.
<br>
According to CODE, satellite SVN34 has been observed occasionally
by <br>
the IGS network between the the decommission of satellite SVN54
and <br>
the official announcement. Therefore, the following satellite has
been <br>
added to the igs14.atx starting from 24. January 2018:<br>
<br>
G18 (G034)
<br>
<br>
NANU message 2018010:
<br>
<br>
<span style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial; display: inline !important;
float: none;">NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2018010
NANU TYPE: GENERAL</span><br style="color: rgb(0, 0, 0);
font-family: "Times New Roman"; font-size: 12px;
font-style: normal; font-variant-ligatures: normal;
font-variant-caps: normal; font-weight: 400; letter-spacing:
normal; orphans: 2; text-align: start; text-indent: 0px;
text-transform: none; white-space: normal; widows: 2;
word-spacing: 0px; -webkit-text-stroke-width: 0px;
text-decoration-style: initial; text-decoration-color: initial;">
<span style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial; display: inline !important;
float: none;">*** GENERAL MESSAGE TO ALL GPS USERS ***</span><br
style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial;">
<span style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial; display: inline !important;
float: none;">ON 07 MAR 2018, AFTER 2200Z, GPS WILL TRANSITION
SVN34 (PRN18) INTO THE BROADCAST ALMANAC FOR ALL SATELLITES. THE
ALMANAC TRANSITION, ONE SATELLITE AT A TIME, WILL REQUIRE
APPROXIMATELY 24 HOURS TO COMPLETE. ALSO, ON APPROXIMATELY 08
MAR 2018, SVN34 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN18.
SVN34/PRN18 WILL BE UNUSABLE UNTIL FURTHER NOTICE. FUTURE NANUS
WILL NOTIFY USERS OF ANY CHANGES TO THE ABOVE STATED STATUS.</span><br
style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial;">
<span style="color: rgb(0, 0, 0); font-family: "Times New
Roman"; font-size: 12px; font-style: normal;
font-variant-ligatures: normal; font-variant-caps: normal;
font-weight: 400; letter-spacing: normal; orphans: 2;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px; text-decoration-style: initial;
text-decoration-color: initial; display: inline !important;
float: none;">*** GENERAL MESSAGE TO ALL GPS USERS ***</span><br>
<br>
<br>
<a class="moz-txt-link-freetext"
href="https://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2017122">https://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2018010</a>
<br>
<br>
2) The following decommission date has been added:
<br>
<br>
G18 (G054): 23 January 2018<br>
<br>
<br>
<br>
The updated antenna correction model is available at
<br>
<a class="moz-txt-link-freetext"
href="ftp://ftp.igs.org/pub/station/general/igs14_1977.atx">ftp://ftp.igs.org/pub/station/general/igs14_1992.atx</a>
<br>
or
<br>
<a class="moz-txt-link-freetext"
href="ftp://ftp.igs.org/pub/station/general/igs14.atx">ftp://ftp.igs.org/pub/station/general/igs14.atx</a>
<br>
<br>
<br>
With best regards,
<br>
Arturo Villiger
<br>
on behalf of the IGS Antenna Working Group
<br>
<br>
<div class="moz-txt-sig"><span class="moz-txt-tag">-- <br>
</span>------------------------------------------------------------------------
<br>
Arturo Villiger
<br>
Astronomical Institute
<br>
University of Bern
<br>
Sidlerstrasse 5
<br>
CH - 3012 Bern / Switzerland
<br>
<br>
phone ++41 31 631 85 06
<br>
fax ++41 31 631 38 69
<br>
<a class="moz-txt-link-abbreviated"
href="mailto:arturo.villiger@aiub.unibe.ch">arturo.villiger@aiub.unibe.ch</a>
<br>
------------------------------------------------------------------------
<br>
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