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

Laboratory 1Observatorio NacionalID Number010End Date2021-04-25
Latitude 22° 53 min 44.563 s SCounter Delay 0.13 nsReference SourceSIMT(ONRJ)
Longitude 43° 13 min 27.407 s WREF Delay 54.2 nsMask Angle10°
Altitude35.82 mReceiver Delay146.7 nsReceiver Temp.28 °C
Laboratory 2National Research CouncilID Number008Baseline7681.193 km
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

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 36.01 17.97 +1.45 x 10-13 +0.73




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 139 1.20 x 10-11
0 h, 20 min 137 6.14 x 10-12
0 h, 40 min 133 3.29 x 10-12
1 h, 20 min 125 1.75 x 10-12
2 h, 40 min 109 5.39 x 10-13
5 h, 20 min 77 2.20 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 139 4.16
0 h, 20 min 136 2.97
0 h, 40 min 130 2.65
1 h, 20 min 118 2.61
2 h, 40 min 94 1.68
5 h, 20 min 46 1.57


SIMT(ONRJ) - SIMT(NRC)
(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
1 300 120 9.36 1.14 -8.40 x 10-13 -0.66 View
2 290 100 8.16 2.69 +1.40 x 10-14 +0.01 View
3 360 90 10.98 1.56 -1.71 x 10-12 -0.83 View
4 440 80 7.61 2.87 -5.02 x 10-13 -0.32 View
5 440 90 13.26 3.07 +1.18 x 10-13 +0.82 View
6 370 110 20.82 1.29 +2.02 x 10-13 +0.93 View
7 430 80 4.95 1.10 +1.05 x 10-12 +0.82 View
8 420 130 16.44 1.21 -1.60 x 10-12 -0.77 View
9 440 80 15.03 2.39 -2.85 x 10-13 -0.75 View
10 370 110 16.26 2.49 +2.03 x 10-12 +0.86 View
11 --- --- ---------- ------- -------------- ------ ----
12 360 70 8.93 3.02 +2.99 x 10-13 +0.14 View
13 290 150 8.98 2.02 -2.72 x 10-13 -0.31 View
14 350 140 50.19 12.13 +1.69 x 10-12 +0.34 View
15 350 140 9.27 1.86 +7.05 x 10-13 +0.71 View
16 350 100 11.07 2.21 +6.37 x 10-13 +0.33 View
17 270 80 4.09 1.78 -1.11 x 10-13 -0.15 View
18 420 110 8.86 2.47 +1.82 x 10-13 +0.11 View
19 330 120 12.70 1.21 +1.14 x 10-13 +0.91 View
20 320 130 9.65 1.61 +8.57 x 10-13 +0.68 View
21 260 60 11.33 2.02 -2.04 x 10-12 -0.56 View
22 370 60 4.20 0.08 -1.14 x 10-13 -0.77 View
23 370 140 13.00 2.56 +1.15 x 10-12 +0.69 View
24 200 130 7.20 1.21 -3.13 x 10-13 -0.38 View
25 320 50 17.57 0.00 -1.93 x 10-12 -0.91 View
26 390 90 6.98 1.76 +2.90 x 10-13 +0.25 View
27 280 130 17.94 1.41 -1.46 x 10-12 -0.80 View
28 410 60 10.84 2.47 -6.50 x 10-14 -0.04 View
29 320 80 23.60 3.08 +6.39 x 10-13 +0.85 View
30 290 50 2.17 1.39 -4.77 x 10-13 -0.43 View
31 340 90 8.69 2.96 -6.99 x 10-13 -0.44 View
32 310 100 9.07 2.28 +9.31 x 10-13 +0.84 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.