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 Date2021-04-25
Latitude 45° 27 min 14.853 s NCounter Delay 0.65 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 0.59 nsReference SourceSIMT(INDC)
Longitude 69° 53 min 44.116 s WREF Delay 0 nsMask Angle10°
Altitude1.44 mReceiver Delay11.3 nsReceiver Temp.28 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -27.24 64.19 -4.11 x 10-13 -0.60




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 4.59 x 10-12
0 h, 20 min 140 2.97 x 10-12
0 h, 40 min 136 2.12 x 10-12
1 h, 20 min 128 2.18 x 10-12
2 h, 40 min 112 1.59 x 10-12
5 h, 20 min 80 8.32 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.59
0 h, 20 min 139 1.56
0 h, 40 min 133 2.35
1 h, 20 min 121 5.27
2 h, 40 min 97 5.70
5 h, 20 min 49 4.48


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
1 320 190 31.87 0.89 +1.15 x 10-12 +0.48 View
2 390 390 64.57 1.21 -2.86 x 10-13 -0.52 View
3 420 300 45.11 1.90 -8.92 x 10-13 -0.93 View
4 340 220 23.83 1.16 -1.66 x 10-12 -0.81 View
5 320 320 24.32 1.89 +2.20 x 10-14 +0.07 View
6 360 360 78.89 1.34 -5.76 x 10-13 -0.59 View
7 310 250 54.07 1.74 -3.70 x 10-12 -0.98 View
8 300 260 15.63 0.80 +6.65 x 10-13 +0.61 View
9 430 220 66.35 3.34 +1.26 x 10-12 +0.89 View
10 350 290 38.58 1.48 -2.38 x 10-12 -0.92 View
11 --- --- ---------- ------- -------------- ------ ----
12 440 250 35.44 2.44 +1.29 x 10-14 +0.03 View
13 390 250 41.45 1.84 -7.57 x 10-13 -0.29 View
14 340 220 56.62 9.19 -1.59 x 10-12 -0.62 View
15 340 320 50.17 1.58 +9.50 x 10-13 +0.40 View
16 340 320 79.19 9.49 +9.00 x 10-13 +0.38 View
17 290 250 57.34 2.09 +1.44 x 10-12 +0.61 View
18 360 250 16.00 1.13 -3.51 x 10-13 -0.39 View
19 350 300 71.01 1.26 -2.67 x 10-13 -0.19 View
20 360 300 10.74 0.97 +1.86 x 10-13 +0.39 View
21 330 130 14.29 1.72 -3.22 x 10-13 -0.27 View
22 330 240 35.71 1.35 -7.85 x 10-13 -0.94 View
23 250 130 20.26 2.72 -1.27 x 10-12 -0.79 View
24 350 210 25.30 1.27 +1.81 x 10-12 +0.92 View
25 360 190 49.44 3.30 -2.94 x 10-13 -0.30 View
26 330 320 25.21 4.05 +5.63 x 10-13 +0.64 View
27 350 230 27.81 1.05 +1.72 x 10-12 +0.82 View
28 200 120 19.83 2.69 -2.54 x 10-13 -0.19 View
29 430 250 34.26 3.11 +1.68 x 10-13 +0.22 View
30 330 90 37.45 1.71 -3.43 x 10-12 -0.93 View
31 380 380 22.34 1.54 +8.33 x 10-13 +0.75 View
32 350 290 25.15 1.63 -3.13 x 10-13 -0.26 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.