Subject: [SLR-Mail]  No.2508: First 4 GRACE-FO passes from Riga
From: Jorge_Roberto Del_Pino_Boytel <jorge.delpino@lu.lv>

Author: Riga SLR station team



Riga, May 25th 2018



Dear Colleagues:



On the night of 2018/05/24 we did 2 tandem-pair passes of GRACE-FO-1/2

Using the CPF set released on May 24 we got the following time biases



GRACE-FO1

Timebias

GRACE-FO2

Timebias

21:54 UTC

-3.3 ms

21:57 UTC

-29.7

23:30 UTC

-4.1

23:32 UTC

-34.3



Tracking itself is similar to GRACE-A/B

We expect that more stations will join on the GRACE-FO tracking in the next
days!



Best regards



The Riga team<div dir=&#8221;ltr&#8221;>








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<span name=&#8221;date&#8221;>
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<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Author: <span><span>Riga</span></span> SLR
station team</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span><span>Riga</span></span>, <span>May 25<sup>th</sup> 2018</span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Dear Colleagues:</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>On the night of 2018/05/24 we did 2 tandem-pair passes of
GRACE-FO-1/2</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Using the CPF set released on May 24 we got the following
time biases</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<table class=&#8221;gmail-MsoTableGrid&#8221; style=&#8221;border-collapse:collapse;border:medium none&#8221; cellspacing=&#8221;0&#8221; cellpadding=&#8221;0&#8221; border=&#8221;1&#8221;>
 <tbody><tr>
  <td style=&#8221;border:1pt solid windowtext;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>GRACE-FO1</p>
  </td>
  <td style=&#8221;border-color:windowtext windowtext windowtext currentcolor;border-style:solid solid solid none;border-width:1pt 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Timebias</p>
  </td>
  <td style=&#8221;border-color:windowtext windowtext windowtext currentcolor;border-style:solid solid solid none;border-width:1pt 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>GRACE-FO2</p>
  </td>
  <td style=&#8221;border-color:windowtext windowtext windowtext currentcolor;border-style:solid solid solid none;border-width:1pt 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Timebias</p>
  </td>
 </tr>
 <tr>
  <td style=&#8221;border-color:currentcolor windowtext windowtext;border-style:none solid solid;border-width:medium 1pt 1pt;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span>21:54 UTC</span></p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>-3.3 ms</p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span>21:57 UTC</span></p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>-29.7</p>
  </td>
 </tr>
 <tr>
  <td style=&#8221;border-color:currentcolor windowtext windowtext;border-style:none solid solid;border-width:medium 1pt 1pt;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span>23:30 UTC</span></p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>-4.1</p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span>23:32 UTC</span></p>
  </td>
  <td style=&#8221;border-color:currentcolor windowtext windowtext currentcolor;border-style:none solid solid none;border-width:medium 1pt 1pt medium;padding:0cm 5.4pt&#8221; valign=&#8221;top&#8221;>
  <p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>-34.3</p>
  </td>
 </tr>
</tbody></table>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Tracking itself is similar to GRACE-A/B</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>We expect that more stations will join on the GRACE-FO tracking
in the next days!</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>Best regards</p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;><span></span></p>

<p class=&#8221;MsoNormal&#8221; style=&#8221;margin:0cm 0cm 0.0001pt;font-size:12pt;font-family:&quot;Times New Roman&quot;&#8221;>The <span><span>Riga</span></span> team</p>





</span></span></span></span><br></div>