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

Laboratory 1National Research CouncilID Number008End Date2021-09-13
Latitude 45° 27 min 14.853 s NCounter Delay 0.72 nsReference SourceSIMT(NRC)
Longitude 75° 37 min 25.777 s WREF Delay 38 nsMask Angle10°
Altitude82.59 mReceiver Delay229.3 nsReceiver Temp.34 °C
Laboratory 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline3989.233 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 -6.95 14.86 -6.83 x 10-14 -0.42




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 4.44 x 10-12
0 h, 20 min 140 2.34 x 10-12
0 h, 40 min 136 1.31 x 10-12
1 h, 20 min 128 7.59 x 10-13
2 h, 40 min 112 4.61 x 10-13
5 h, 20 min 80 2.03 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.54
0 h, 20 min 139 1.24
0 h, 40 min 133 1.14
1 h, 20 min 121 1.37
2 h, 40 min 97 1.28
5 h, 20 min 49 2.46


SIMT(NRC) - 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
1 350 170 20.17 1.73 +1.59 x 10-12 +0.80 View
2 370 370 24.62 2.47 -3.29 x 10-13 -0.35 View
3 430 280 22.96 2.42 +1.80 x 10-13 +0.39 View
4 350 150 13.99 2.49 -1.25 x 10-13 -0.07 View
5 320 310 25.56 3.71 -7.77 x 10-13 -0.69 View
6 340 270 17.22 4.28 +4.94 x 10-13 +0.55 View
7 320 240 13.57 3.33 +2.35 x 10-13 +0.27 View
8 320 150 27.59 1.42 +2.11 x 10-12 +0.77 View
9 430 210 13.13 1.39 +1.19 x 10-13 +0.31 View
10 360 290 15.51 2.69 -2.20 x 10-14 -0.08 View
11 --- --- ---------- ------- -------------- ------ ----
12 460 280 25.31 1.87 -4.28 x 10-13 -0.82 View
13 360 170 13.15 0.95 +1.21 x 10-12 +0.85 View
14 360 280 32.92 4.17 -7.35 x 10-13 -0.54 View
15 320 250 20.23 3.86 +2.82 x 10-13 +0.23 View
16 340 240 30.11 3.76 +1.62 x 10-12 +0.83 View
17 230 160 12.88 4.12 +2.12 x 10-16 0.00 View
18 340 210 23.81 2.58 -1.39 x 10-12 -0.82 View
19 360 250 9.27 2.35 -9.73 x 10-14 -0.23 View
20 360 260 13.62 3.27 +8.42 x 10-14 +0.11 View
21 380 160 28.71 1.78 -3.06 x 10-13 -0.88 View
22 390 210 22.83 1.37 +1.83 x 10-13 +0.33 View
23 320 260 12.14 2.34 -1.38 x 10-13 -0.24 View
24 330 170 10.19 0.97 +2.42 x 10-13 +0.26 View
25 340 160 24.12 2.75 -1.57 x 10-13 -0.27 View
26 330 230 16.71 2.79 -1.69 x 10-14 -0.09 View
27 360 190 23.92 1.13 +1.19 x 10-12 +0.71 View
28 --- --- ---------- ------- -------------- ------ ----
29 410 130 19.06 2.13 -1.66 x 10-12 -0.76 View
30 390 150 12.95 2.49 +2.13 x 10-13 +0.22 View
31 370 370 35.34 3.70 -1.14 x 10-13 -0.51 View
32 380 380 25.40 2.04 +2.44 x 10-14 +0.13 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.