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

Laboratory 1Observatorio NacionalID Number010End Date2021-04-24
Latitude 22° 53 min 44.563 s SCounter Delay 0.10 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 2Centro Nacional de MetrologiaID Number007Baseline7351.143 km
Latitude 20° 32 min 13.284 s NCounter Delay 2.15 nsReference SourceSIMT(CNM)
Longitude100° 15 min 16.831 s WREF Delay 8.6 nsMask Angle10°
Altitude1928.65 mReceiver Delay140.3 nsReceiver Temp.32° C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 6.16 26.21 -6.11 x 10-14 -0.22




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 5.74 x 10-12
0 h, 20 min 140 2.62 x 10-12
0 h, 40 min 136 1.92 x 10-12
1 h, 20 min 128 1.28 x 10-12
2 h, 40 min 112 7.75 x 10-13
5 h, 20 min 80 5.55 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.99
0 h, 20 min 139 1.36
0 h, 40 min 133 1.76
1 h, 20 min 121 2.63
2 h, 40 min 97 3.50
5 h, 20 min 49 6.57


SIMT(ONRJ) - SIMT(CNM)
(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 5.77 0.96 -5.08 x 10-13 -0.64 View
2 280 0 0.00 0.00 0.00 x 10 0 0.00 View
3 370 30 5.70 0.00 -2.07 x 10-12 -0.44 View
4 450 110 7.97 1.03 +1.01 x 10-12 +0.72 View
5 450 90 7.81 1.80 +8.23 x 10-13 +0.55 View
6 360 90 9.75 2.66 -1.10 x 10-12 -0.62 View
7 430 140 11.10 1.00 +1.03 x 10-12 +0.60 View
8 410 200 37.17 1.92 -2.66 x 10-12 -0.90 View
9 440 90 7.85 1.79 +1.42 x 10-12 +0.80 View
10 370 140 23.19 1.35 +3.07 x 10-12 +0.95 View
11 --- --- ---------- ------- -------------- ------ ----
12 360 0 0.00 0.00 0.00 x 10 0 0.00 View
13 300 200 21.95 1.74 +1.65 x 10-13 +0.70 View
14 350 160 21.75 1.79 +1.84 x 10-12 +0.86 View
15 350 200 22.77 1.33 +9.01 x 10-13 +0.69 View
16 350 160 12.72 1.91 -8.37 x 10-13 -0.72 View
17 270 50 9.90 1.62 -3.19 x 10-12 -0.83 View
18 430 170 23.95 2.61 +2.14 x 10-12 +0.93 View
19 340 110 10.15 2.16 +5.52 x 10-13 +0.35 View
20 330 110 28.69 4.07 +3.82 x 10-12 +0.89 View
21 270 130 11.02 1.62 -1.02 x 10-12 -0.73 View
22 370 90 11.94 3.13 -1.37 x 10-12 -0.61 View
23 370 150 18.57 3.88 +1.62 x 10-12 +0.81 View
24 190 170 14.45 2.43 -5.16 x 10-13 -0.42 View
25 330 90 8.13 1.08 -2.52 x 10-13 -0.26 View
26 410 110 9.01 1.49 -5.91 x 10-13 -0.76 View
27 270 200 30.44 1.32 -2.24 x 10-12 -0.92 View
28 410 150 15.52 1.16 +1.38 x 10-12 +0.90 View
29 310 130 14.91 2.26 +1.28 x 10-12 +0.68 View
30 270 90 15.69 1.88 +1.40 x 10-12 +0.78 View
31 350 70 5.13 2.46 -8.30 x 10-13 -0.58 View
32 330 100 21.36 2.21 +3.50 x 10-12 +0.94 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.