<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
Dear IGS colleagues,<br>
<br>
The absolute IGS antenna correction file (igs14_wwww.atx) has been<br>
updated. The new release is called 'igs14_1973.atx'. It contains <br>
the following changes:<span class="moz-txt-link-freetext"><br>
</span><br>
1) According to the Information Analytical Centre (IAC), GLONASS-M
satellite<br>
R852 (2017-055A) launched on 22 September 2017 was put into
operation in slot 14.<br>
According to the Center for Orbit Determination in Europe (CODE),
R852 became <br>
active on the 10 October 2017 (DOY 283). Note that the SVN number
was assigned according <br>
to an IGS Workshop recommendation (see IGSMAIL #7252) to 852
(changed from 752 to 852). <br>
<br>
The following PRELIMINARY phase center offset (PCO) values were
assigned:<br>
<br>
PCO_X = -54.5 cm<br>
PCO_Y = 0.0 cm<br>
PCO_Z = 245.0 cm<br>
<br>
<br>
NAGU message 014-170922:
<pre style="color: rgb(0, 59, 102); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial;">014-170922
NOTICE ADVISORY TO GLONASS USERS (NAGU) 014-170922
SUBJ: FORECAST PUT INTO OPERATION 14/-7 (752) ON 20.10
1.CONDITION: 14/-7 (752) IS SCHEDULED TO BE OPERATION ON 20.10
AFTER MAINTENANCE
2.USERS ARE REMINDED TO UPDATE ALMANACS IF NECESSARY</pre>
<a class="moz-txt-link-freetext"
href="https://www.glonass-iac.ru/en/CUSGLONASS/index.php">https://www.glonass-iac.ru/en/CUSGLONASS/index.php</a><br>
<br>
2) Analyses performed at CODE have shown that R801 was switched from
R14 to R26 on the 06. October 2017:<br>
<br>
R26 (801): 06 October 2017<br>
<br>
3) The following decommission dates have been added:
<br>
<br>
R14 (R801): 05 October 2017
<br>
<br>
<span class="moz-txt-link-freetext">4) Two additional antenna type
calibration has been added that was performed by Geo++ GmbH:<br>
</span> - One robot calibration provided by Harxon Corporation:<br>
HXCCGX601A HXCS<br>
<br>
- One robot calibration provided by Septentrio:<br>
SEPALTUS_NR3 NONE<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_1949.atx">ftp://ftp.igs.org/pub/station/general/igs14_1973.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>
</body>
</html>