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

Laboratory 1National Research CouncilID Number008End Date2021-04-23
Latitude 45° 27 min 14.853 s NCounter Delay 0.70 nsReference SourceSIMT(NRC)
Longitude 75° 37 min 25.777 s WREF Delay 38 nsMask Angle10°
Altitude82.59 mReceiver Delay229.3 nsReceiver Temp.33 °C
Laboratory 2INDOCAL Dominican RepublicID Number029Baseline3010.600 km
Latitude 18° 27 min 57.917 s NCounter Delay 0.39 nsReference SourceSIMT(INDC)
Longitude 69° 53 min 44.116 s WREF Delay 0 nsMask Angle10°
Altitude1.44 mReceiver Delay11.3 nsReceiver Temp.29 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -26.56 71.76 +1.95 x 10-14 +0.03




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 4.07 x 10-12
0 h, 20 min 140 2.69 x 10-12
0 h, 40 min 136 2.38 x 10-12
1 h, 20 min 128 2.79 x 10-12
2 h, 40 min 112 2.66 x 10-12
5 h, 20 min 80 8.37 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.41
0 h, 20 min 139 1.48
0 h, 40 min 133 2.79
1 h, 20 min 121 6.79
2 h, 40 min 97 9.81
5 h, 20 min 49 6.67


SIMT(NRC) - SIMT(INDC)
(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
1 360 210 29.73 0.76 +2.44 x 10-12 +0.98 View
2 390 390 75.97 1.48 +3.74 x 10-13 +0.59 View
3 410 290 24.55 1.57 -2.71 x 10-13 -0.61 View
4 330 220 31.99 1.17 -2.85 x 10-12 -0.96 View
5 330 330 77.61 1.87 +6.93 x 10-13 +0.56 View
6 360 360 79.48 1.84 +3.28 x 10-13 +0.42 View
7 310 250 30.08 1.41 -1.34 x 10-12 -0.70 View
8 310 260 45.98 0.78 +1.93 x 10-12 +0.59 View
9 430 220 103.75 2.69 +2.52 x 10-12 +0.96 View
10 350 290 37.57 1.55 -4.60 x 10-13 -0.23 View
11 --- --- ---------- ------- -------------- ------ ----
12 430 250 79.23 2.95 +8.01 x 10-13 +0.90 View
13 380 250 71.50 1.42 +5.74 x 10-12 +0.96 View
14 340 220 30.29 2.37 -9.91 x 10-13 -0.46 View
15 340 320 43.19 2.37 +1.03 x 10-12 +0.47 View
16 330 300 23.45 2.22 -2.03 x 10-13 -0.22 View
17 290 260 62.48 1.18 +1.70 x 10-12 +0.64 View
18 360 250 59.65 1.23 -4.81 x 10-12 -0.95 View
19 360 300 62.27 1.39 +3.90 x 10-13 +0.37 View
20 360 300 47.87 1.23 -2.74 x 10-12 -0.83 View
21 310 120 39.57 1.05 +3.67 x 10-12 +0.97 View
22 300 220 32.44 1.53 -5.18 x 10-13 -0.66 View
23 250 130 39.07 1.78 +1.31 x 10-12 +0.33 View
24 350 210 34.63 1.09 -1.82 x 10-12 -0.59 View
25 360 190 49.08 3.38 +5.37 x 10-13 +0.53 View
26 340 320 27.69 2.92 -1.75 x 10-14 -0.02 View
27 360 240 28.65 1.23 +7.82 x 10-13 +0.42 View
28 210 120 39.84 1.30 +1.17 x 10-12 +0.36 View
29 420 240 50.70 4.84 +1.25 x 10-13 +0.12 View
30 340 90 26.03 0.89 -2.32 x 10-12 -0.99 View
31 380 380 12.91 1.44 +1.87 x 10-13 +0.42 View
32 360 300 19.46 1.76 +4.46 x 10-13 +0.56 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.