Changeset 11108 in ntrip

Timestamp:

Oct 21, 2026, 2:18:10 AM (8 hours ago)

Author:

stuerze

Message:

help contents updated

File:

• trunk/BNC/src/bnchelp.html (modified) (2 diffs)

trunk/BNC/src/bnchelp.html

@@ -7988 +7988 @@
  dC_att = (yawAngle_AC - yawAngle_MasterAC) / (2*PI) * wavelength(IF)
 </pre>
+  <p>
+    A yaw angle difference changes the phase wind-up, which the AC's clock absorbs with the wavelength of the
+    ionosphere-free combination of the reference signals (about 10.7 cm for GPS). The yaw angle of each AC is taken
+    from its attitude selected in the 'Attitude' field (SSR yaw angle, or BNC's 'Computed' or 'Nominal' model); the
+    yaw angle difference is reduced to +-180 degrees. dC_att is therefore zero for two ACs with the same attitude model
+    and differs from zero mainly during eclipse seasons and noon/midnight turns, if an AC sends its yaw angles and
+    'SSR' is selected for it. A constant part is absorbed by the AC's satellite offset. dC_att requires an ANTEX file.
+  </p>
 
   <p>
@@ -8320 +8328 @@
       Select this option only if you trust the yaw values provided by the Analysis Center.</li>
   </ul>
-  Note that the attitude model affects APC-referenced correction streams only.
-  For CoM-referenced streams (SSRC) the Analysis Center has already applied its own attitude model before encoding.</p>
+  Note that the attitude model affects the orbits of APC-referenced correction streams only.
+  For CoM-referenced streams (SSRC) the Analysis Center has already applied its own attitude model before encoding.
+  For all streams, the attitude determines the yaw angle of the attitude consistency correction dC_att of the clocks
+  (see above).</p>
   <p>
     Note that the orbit information in the resulting combination stream is just copied from one of the incoming streams.