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Dear IGS colleagues! <br>
<br>
The absolute IGS antenna correction file (igs14_wwww.atx) has been <br>
updated. The new release is called 'igs14_2022.atx'. It contains the
<br>
following changes: <br>
<br>
<br>
1) According to NANU 2018042, BLOCK IIA satellite SVN36 will resume
<br>
transmitting L-band utilizing PRN04 on approximately 10 October
2018. <br>
Therefore, the following satellite has been added to igs14.atx (The
<br>
actual start date will be adapted with the next release.): <br>
<br>
G04 (G036) <br>
<br>
NANU message 2018042:
<pre wrap="">NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2018042 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
ON APPROXIMATELY 10 OCT 2018 SVN36 WILL RESUME TRANSMITTING L-BAND
UTILIZING PRN04.
AT L-BAND ACTIVATION, SVN36/PRN04 WILL BE UNUSABLE UNTIL FURTHER NOTICE.
ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN36/PRN04 UNTIL FURTHER
NOTICE.
*** GENERAL MESSAGE TO ALL GPS USERS ***
<a class="moz-txt-link-freetext" href="https://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2018042" moz-do-not-send="true">https://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2018042</a></pre>
2) According to CODE, G049 stopped signal transmission on 28
September <br>
2018. Therefore, a decommission date for the following satellite has
<br>
been added: <br>
<br>
G04 (G049): 28 September 2018 (23:59:59.9999999) <br>
<br>
3) According to the NAGU 2018017 4 new Galileo FOC satellites have
been launched on 25. Juli 2018
<br>
(FOC-19 to FOC-22, 2018-060A to 2018-060D):
<br>
E36 (E219)
<br>
E13 (E220)
<br>
E15 (E221)
<br>
E33 (E222)
<br>
<br>
The following PRELIMINARY phase center offset (PCO) values were
assigned:
<br>
(Preliminary PCO values (no PV) using mean values of FOC-3 to FOC-14
):
<br>
<br>
Frq PCO_X PCO_Y PCO_Z
<br>
---- --------- -------- ---------
<br>
E05 120.00 -10.00 620.00
<br>
E07 120.00 -10.00 660.00
<br>
E06 120.00 -10.00 680.00
<br>
E01 120.00 -10.00 720.00
<br>
E08 120.00 -10.00 640.00
<br>
<br>
NAGU message 2018017:<br>
<pre style="color: rgb(0, 0, 0); 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; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; overflow-wrap: break-word; white-space: pre-wrap;">NOTICE ADVISORY TO GALILEO USERS (NAGU) 2018017
DATE GENERATED (UTC): 2018-07-26 10:40
NAGU TYPE: GENERAL
NAGU NUMBER: 2018017
NAGU SUBJECT: LAUNCH OF GSAT0219, GSAT0220, GSAT0221 AND GSAT0222
NAGU REFERENCED TO: N/A
START DATE EVENT (UTC): 2018-07-25 11:25
END DATE EVENT (UTC): N/A
SATELLITE AFFECTED: GSAT0219, GSAT0220, GSAT0221, GSAT0222
EVENT DESCRIPTION: GALILEO SATELLITES GSAT0219 (SVID 36), GSAT0220 (SVID 13), GSAT0221 (SVID 15) AND GSAT0222 (SVID 33) WERE LAUNCHED ON 2018-07-25 AT 11:25 UTC. GSAT0219, GSAT0220, GSAT0221 AND GSAT0222 ARE PLANNED TO BE POSITIONED IN SLOTS B04, B01, B02 AND B07 OF THE CONSTELLATION. USERS WILL BE ADVISED OF AVAILABILITY OF SIGNALS FOLLOWING COMPLETION OF COMMISSIONING ACTIVITIES.</pre>
<a class="moz-txt-link-freetext" href="https://www.gsc-europa.eu/sites/default/files/NOTICE_ADVISORY_TO_GALILEO_USERS_NAGU_2018017.txt">https://www.gsc-europa.eu/sites/default/files/NOTICE_ADVISORY_TO_GALILEO_USERS_NAGU_2018017.txt</a><br>
<br>
4) One additional antenna type calibration have been added that was
performed by Geo++ GmbH:
<br>
- One robot calibration provided by Trimble Navigation Limited
has been added:
<br>
TRMSPS986 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_2022.atx"
moz-do-not-send="true">ftp://ftp.igs.org/pub/station/general/igs14_2022.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>
With best regards,
<br>
Arturo Villiger
<br>
on behalf of the IGS Antenna Working Group
<br>
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