SIMT(IBM) versus SIMT(CNMP) via Common-View GPS
1 Day Averages 1 Hour Averages 10 Minute Averages Next Date Last Date Flip    

Laboratory 1IBMETRO Bolivia ID Number025End Date2021-09-13
Latitude 16° 30 min 1.070 s SCounter Delay 0.01 nsReference SourceSIMT(IBM)
Longitude 68° 7 min 56.998 s WREF Delay 2.9 nsMask Angle10°
Altitude3648.75 mReceiver Delay103.0 nsReceiver Temp.41 °C
Laboratory 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline3060.081 km
Latitude 9° 0 min 3.590 s NCounter Delay -0.10 nsReference SourceSIMT(CNMP)
Longitude 79° 35 min 5.880 s WREF Delay 45.66 nsMask Angle10°
Altitude47.23 mReceiver Delay122.1 nsReceiver Temp.27 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -76.35 21.39 -1.29 x 10-13 -0.54




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 6.43 x 10-12
0 h, 20 min 140 4.47 x 10-12
0 h, 40 min 136 2.49 x 10-12
1 h, 20 min 128 1.51 x 10-12
2 h, 40 min 112 6.57 x 10-13
5 h, 20 min 80 3.77 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 2.23
0 h, 20 min 139 2.44
0 h, 40 min 133 2.34
1 h, 20 min 121 2.58
2 h, 40 min 97 2.20
5 h, 20 min 49 3.32


SIMT(IBM) - SIMT(CNMP)
(common-view tracks from individual GPS satellites)
GPS
PRN		 Minutes
(In-View)		 Minutes
(Common-View)		 Range (ns) Time
Deviation		 Frequency Offset Confidence (r) View
Detail
1 340 270 32.63 3.55 +5.80 x 10-14 +0.04 View
2 290 190 23.39 3.64 +1.66 x 10-13 +0.29 View
3 310 180 19.01 3.75 -9.70 x 10-13 -0.58 View
4 300 210 21.34 2.88 +2.89 x 10-13 +0.20 View
5 300 180 19.53 2.63 +2.90 x 10-13 +0.19 View
6 260 160 24.92 1.79 -1.52 x 10-12 -0.67 View
7 350 240 22.22 2.52 +1.61 x 10-13 +0.11 View
8 330 250 27.76 3.36 +1.27 x 10-12 +0.68 View
9 330 160 32.40 4.27 -1.48 x 10-12 -0.55 View
10 290 210 22.34 1.35 +8.42 x 10-14 +0.50 View
11 --- --- ---------- ------- -------------- ------ ----
12 310 170 47.30 4.53 -1.74 x 10-12 -0.84 View
13 330 190 31.57 3.30 -7.54 x 10-13 -0.51 View
14 320 240 28.89 1.48 +1.41 x 10-12 +0.65 View
15 310 250 35.76 2.28 -1.81 x 10-12 -0.77 View
16 290 250 28.30 2.62 -1.63 x 10-13 -0.68 View
17 210 80 18.00 5.30 -1.39 x 10-13 -0.21 View
18 360 240 26.41 2.58 -6.40 x 10-13 -0.38 View
19 230 50 25.41 0.00 -8.17 x 10-13 -0.98 View
20 280 240 24.69 2.13 -8.29 x 10-13 -0.49 View
21 340 220 27.57 2.52 +4.79 x 10-13 +0.24 View
22 140 90 18.33 5.98 -3.70 x 10-13 -0.52 View
23 300 240 27.30 2.58 +1.54 x 10-13 +0.47 View
24 280 150 26.56 1.70 -8.98 x 10-13 -0.59 View
25 390 330 21.95 4.46 -3.13 x 10-14 -0.04 View
26 320 270 42.02 2.39 -1.62 x 10-13 -0.51 View
27 330 240 18.37 2.52 +4.58 x 10-13 +0.38 View
28 --- --- ---------- ------- -------------- ------ ----
29 340 200 28.87 3.09 -1.18 x 10-12 -0.51 View
30 290 200 18.71 2.90 +6.53 x 10-13 +0.44 View
31 230 130 23.97 1.93 +2.76 x 10-12 +0.98 View
32 320 240 65.92 5.88 -1.50 x 10-14 -0.04 View


Legend
GPS PRNThe unique pseudo random noise (PRN) code (1 to 32) used to identify each satellite. If no satellite is assigned to a given PRN code, then no data are shown.
Minutes
(In-View)		The number of minutes when the satellite was visible at laboratory 1. During this period, the time difference between the satellite clock and the laboratory reference is measured every second, and 10 minute averages are stored. Since data is recorded in 10 minute segments, the values are even multiples of 10 minutes.
Minutes
(Common-View)		The number of minutes when the satellite was visible at both sites involved in the common-view comparison.
RangeThe difference between the maximum and minimum time offset values (nanoseconds).
Time
Deviation		The time deviation (TDEV) of the 10-minute averages (nanoseconds).
Frequency
Offset		The estimated frequency offset of laboratory 1 relative to laboratory 2 based on a common-view observation of the satellite. This estimate is obtained by fitting a least squares line to all of the recorded data.
Confidence
Level (r)		The confidence level of the estimated frequency offset. The confidence level is the correlation coefficient (r) of the least squares line fitted to the data.
View
Track		Clicking on the View link displays a common-view track from the selected satellite. The number of previous days shown equals the number of previous days shown on this page, up to a maximum of 30 days.