Changeset 11117 in ntrip for trunk/BNC/src/bnchelp.html

Timestamp:

Oct 22, 2026, 5:22:15 PM (2 days ago)

Author:

stuerze

Message:

VTEC check added in ssr qc

File:

• trunk/BNC/src/bnchelp.html (modified) (1 diff)

trunk/BNC/src/bnchelp.html

@@ -5235 +5235 @@
     clock 0.689 (STD 0.008), radial 0.020, along 0.036, cross 0.022, SIS (radial - clock) 0.687 (STD 0.008)
   G satellites deviating from the reference, RMS SIS [m]: G02(0.38) G16(0.33) G20(0.91) G26(3.36)
+</pre>
+  <p>
+    <b>Ionospheric models (VTEC):</b> Streams with VTEC messages (e.g. the ionosphere streams 'IONO...', or SSR
+    streams also carrying VTEC) get the pseudo system 'V' (VTEC) in the report: epochs, declared and actual update interval,
+    gaps and latency of the VTEC messages, the model (number of layers, layer heights, degree and order of the
+    spherical harmonics), and the range of the VTEC values on a global grid (10 degrees in latitude from -80 to 80
+    degrees, 15 degrees in longitude), including the percentage of negative values, which are set to zero as in PPP.
+    Every 300 seconds (with a delay of 120 seconds), the latest model of each stream not older than twice its update
+    interval (at least 120 seconds, at most one hour) is evaluated on this grid and compared with the median of the
+    models of the other AC solutions (one vote per solution, own AC left out, combinations like 'IONO00IGS1' not
+    voting; at least one other solution), or with the selected 'QC Reference' stream. The mean difference (a bias
+    of the model) and the RMS are given in TEC units, e.g.
+  </p>
+  <pre>
+  V   VTEC            60        60 /  60.0 /   60.0     0             0       1.0 /    5.0      1
+  V VTEC model: 1 layer(s): 450 km (degree/order 15/15)
+  V VTEC on a global 10 x 15 deg grid: 2.1 ... 65.7 TECU, negative (set to zero) 0.0 %
+  V VTEC comparison with consensus of the other ACs (1.0 solutions on average), 12 epochs: mean 3.47 TECU, RMS 7.55 TECU, max |diff| 24.0 TECU
 </pre>
   <p>