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

Laboratory 1Centro Nacional de Metrologia de Panama AIPID Number009End Date2021-09-13
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
Laboratory 2IBMETRO Bolivia ID Number025Baseline3060.081 km
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

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(CNMP) - SIMT(IBM)
(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
1 310 270 32.63 3.55 -5.80 x 10-14 -0.04 View
2 530 190 23.39 3.64 -1.66 x 10-13 -0.29 View
3 470 180 19.01 3.75 +9.70 x 10-13 +0.58 View
4 240 210 21.34 2.88 -2.89 x 10-13 -0.20 View
5 420 180 19.53 2.63 -2.90 x 10-13 -0.19 View
6 370 160 24.92 1.79 +1.52 x 10-12 +0.67 View
7 340 240 22.22 2.52 -1.61 x 10-13 -0.11 View
8 250 250 27.76 3.36 -1.27 x 10-12 -0.68 View
9 360 160 32.40 4.27 +1.48 x 10-12 +0.55 View
10 370 210 22.34 1.35 -8.42 x 10-14 -0.50 View
11 --- --- ---------- ------- -------------- ------ ----
12 470 170 47.30 4.53 +1.74 x 10-12 +0.84 View
13 240 190 31.57 3.30 +7.54 x 10-13 +0.51 View
14 360 240 28.89 1.48 -1.41 x 10-12 -0.65 View
15 330 250 35.76 2.28 +1.81 x 10-12 +0.77 View
16 340 250 28.30 2.62 +1.63 x 10-13 +0.68 View
17 370 80 18.00 5.30 +1.39 x 10-13 +0.21 View
18 310 240 26.41 2.58 +6.40 x 10-13 +0.38 View
19 390 50 25.41 0.00 +8.17 x 10-13 +0.98 View
20 330 240 24.69 2.13 +8.29 x 10-13 +0.49 View
21 380 220 27.57 2.52 -4.79 x 10-13 -0.24 View
22 360 90 18.33 5.98 +3.70 x 10-13 +0.52 View
23 410 240 27.30 2.58 -1.54 x 10-13 -0.47 View
24 260 150 26.56 1.70 +8.98 x 10-13 +0.59 View
25 450 330 21.95 4.46 +3.13 x 10-14 +0.04 View
26 340 270 42.02 2.39 +1.62 x 10-13 +0.51 View
27 290 240 18.37 2.52 -4.58 x 10-13 -0.38 View
28 --- --- ---------- ------- -------------- ------ ----
29 260 200 28.87 3.09 +1.18 x 10-12 +0.51 View
30 280 200 18.71 2.90 -6.53 x 10-13 -0.44 View
31 450 130 23.97 1.93 -2.76 x 10-12 -0.98 View
32 530 240 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.