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 Date2021-04-23
Latitude 22° 53 min 44.563 s SCounter Delay 0.02 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 0.70 nsReference SourceSIMT(NRC)
Longitude 75° 37 min 25.777 s WREF Delay 38 nsMask Angle10°
Altitude82.59 mReceiver Delay229.3 nsReceiver Temp.33 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 33.83 14.24 -2.28 x 10-14 -0.16




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 140 5.65 x 10-12
0 h, 20 min 138 2.89 x 10-12
0 h, 40 min 134 1.67 x 10-12
1 h, 20 min 126 1.07 x 10-12
2 h, 40 min 110 5.26 x 10-13
5 h, 20 min 78 2.29 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 140 1.96
0 h, 20 min 137 1.47
0 h, 40 min 131 1.51
1 h, 20 min 119 1.90
2 h, 40 min 95 1.84
5 h, 20 min 47 2.25


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
1 310 130 11.56 1.37 -1.53 x 10-12 -0.94 View
2 290 100 7.67 2.62 +7.85 x 10-13 +0.58 View
3 360 90 9.68 1.46 -1.67 x 10-12 -0.82 View
4 440 70 4.15 1.12 -3.99 x 10-13 -0.36 View
5 450 110 12.19 2.61 -8.90 x 10-14 -0.71 View
6 370 110 9.36 2.19 -7.38 x 10-14 -0.78 View
7 430 80 5.90 1.68 +1.00 x 10-12 +0.75 View
8 420 130 8.13 1.46 -5.04 x 10-13 -0.51 View
9 440 80 20.09 2.60 -5.98 x 10-13 -0.96 View
10 370 110 16.33 1.74 +2.13 x 10-12 +0.89 View
11 --- --- ---------- ------- -------------- ------ ----
12 360 70 7.62 2.94 -8.56 x 10-13 -0.44 View
13 290 150 14.51 1.43 -8.31 x 10-13 -0.63 View
14 350 130 15.70 3.40 +10.00 x 10-13 +0.54 View
15 340 130 6.28 1.41 -2.88 x 10-13 -0.32 View
16 350 100 7.33 2.14 +8.89 x 10-13 +0.63 View
17 260 80 2.34 0.41 -4.88 x 10-13 -0.87 View
18 430 120 8.06 1.47 +6.59 x 10-13 +0.55 View
19 330 120 8.61 0.73 -7.83 x 10-14 -0.87 View
20 340 130 7.47 1.38 +5.93 x 10-13 +0.60 View
21 270 60 6.65 1.83 -1.22 x 10-12 -0.49 View
22 370 50 6.05 3.01 -2.11 x 10-12 -0.75 View
23 340 110 9.55 2.35 +5.84 x 10-13 +0.60 View
24 210 130 7.04 1.38 -2.42 x 10-13 -0.26 View
25 350 90 17.65 2.25 -1.76 x 10-12 -0.89 View
26 380 80 7.69 1.28 +1.17 x 10-12 +0.74 View
27 280 140 12.33 1.15 -7.74 x 10-13 -0.60 View
28 400 60 8.50 1.49 +7.20 x 10-13 +0.75 View
29 310 70 19.12 2.80 +5.54 x 10-13 +0.81 View
30 300 50 3.44 0.92 +3.52 x 10-13 +0.24 View
31 350 100 7.85 1.74 -2.94 x 10-13 -0.27 View
32 340 130 10.08 2.12 +5.08 x 10-13 +0.44 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.