SIMT(NRC) versus SIMT(ONRJ) 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 2Observatorio NacionalID Number010Baseline7681.193 km
Latitude 22° 53 min 44.563 s SCounter Delay 0.07 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

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -24.36 14.18 -2.99 x 10-14 -0.20




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 141 5.35 x 10-12
0 h, 20 min 139 3.65 x 10-12
0 h, 40 min 135 1.98 x 10-12
1 h, 20 min 127 1.21 x 10-12
2 h, 40 min 111 6.21 x 10-13
5 h, 20 min 79 3.36 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 141 1.85
0 h, 20 min 138 1.93
0 h, 40 min 132 1.80
1 h, 20 min 120 2.29
2 h, 40 min 96 2.05
5 h, 20 min 48 3.61


SIMT(NRC) - SIMT(ONRJ)
(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
1 350 120 6.16 1.64 +2.23 x 10-13 +0.26 View
2 370 80 8.71 1.25 -1.99 x 10-12 -0.87 View
3 430 100 7.55 2.77 -5.86 x 10-13 -0.44 View
4 350 80 8.19 1.29 +8.70 x 10-13 +0.50 View
5 320 80 8.99 3.02 +7.31 x 10-14 +0.15 View
6 340 90 16.10 1.21 -7.53 x 10-13 -0.89 View
7 320 100 7.51 2.13 -3.68 x 10-13 -0.27 View
8 320 140 15.46 1.67 +2.17 x 10-13 +0.13 View
9 430 80 15.65 3.48 -2.24 x 10-13 -0.52 View
10 360 130 11.30 2.25 -8.03 x 10-14 -0.56 View
11 --- --- ---------- ------- -------------- ------ ----
12 460 50 6.58 2.02 +5.04 x 10-13 +0.41 View
13 360 110 9.77 2.02 +1.09 x 10-12 +0.63 View
14 360 140 36.96 4.93 -2.92 x 10-12 -0.72 View
15 320 130 8.22 1.69 +2.72 x 10-13 +0.28 View
16 340 100 8.79 0.97 -1.37 x 10-13 -0.09 View
17 230 50 3.73 1.30 -1.14 x 10-12 -0.69 View
18 340 120 18.87 2.78 -8.65 x 10-14 -0.04 View
19 360 120 9.87 2.26 -7.70 x 10-13 -0.54 View
20 360 130 20.54 1.90 -6.55 x 10-13 -0.87 View
21 380 80 2.33 0.69 +1.53 x 10-13 +0.36 View
22 390 50 5.37 2.29 -1.50 x 10-12 -0.65 View
23 320 120 15.24 0.85 -2.22 x 10-12 -0.90 View
24 330 130 18.97 1.03 +2.39 x 10-12 +0.89 View
25 340 120 10.02 1.90 +8.83 x 10-13 +0.66 View
26 330 130 11.00 1.04 +2.93 x 10-14 +0.32 View
27 360 90 7.57 1.79 +8.45 x 10-13 +0.66 View
28 --- --- ---------- ------- -------------- ------ ----
29 410 80 3.85 0.56 -1.43 x 10-14 -0.35 View
30 390 50 1.70 0.81 +2.40 x 10-13 +0.35 View
31 370 90 14.81 2.26 -1.44 x 10-13 -0.84 View
32 380 140 5.70 1.38 +2.89 x 10-14 +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.