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

Laboratory 1Centro de Investigaciones de MetrologiaID Number028End Date2021-09-13
Latitude 13° 43 min 13.213 s NCounter Delay -0.14 nsReference SourceSIMT(CIM)
Longitude 89° 12 min 0.835 s WREF Delay 2.5 nsMask Angle10°
Altitude692.56 mReceiver Delay83.2 nsReceiver Temp.27 °C
Laboratory 2Observatorio NacionalID Number010Baseline6171.323 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 -23.01 733.03 -3.42 x 10-12 -0.52




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 3.36 x 10-11
0 h, 20 min 140 2.45 x 10-11
0 h, 40 min 136 2.19 x 10-11
1 h, 20 min 128 2.58 x 10-11
2 h, 40 min 112 2.30 x 10-11
5 h, 20 min 80 1.05 x 10-11


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 11.64
0 h, 20 min 139 13.74
0 h, 40 min 133 26.35
1 h, 20 min 121 64.80
2 h, 40 min 97 109.15
5 h, 20 min 49 58.64


SIMT(CIM) - 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
1 330 230 490.64 1.81 -3.77 x 10-11 -0.99 View
2 460 80 159.63 12.79 -1.60 x 10-11 -0.58 View
3 230 50 49.36 2.96 -1.94 x 10-11 -0.92 View
4 280 160 198.80 1.84 -2.37 x 10-11 -0.99 View
5 370 120 47.13 2.72 -5.71 x 10-12 -0.91 View
6 360 90 22.36 1.98 +2.27 x 10-12 +0.60 View
7 300 180 110.73 1.96 +9.90 x 10-12 +0.83 View
8 290 210 344.45 6.69 +2.85 x 10-11 +0.84 View
9 250 120 93.18 0.94 -1.26 x 10-11 -0.99 View
10 290 180 77.96 2.59 -6.46 x 10-13 -0.91 View
11 --- --- ---------- ------- -------------- ------ ----
12 200 40 147.88 1.98 -8.19 x 10-11 -1.00 View
13 240 180 513.90 7.17 -4.72 x 10-11 -0.94 View
14 330 200 45.51 2.29 -2.53 x 10-12 -0.65 View
15 320 210 523.98 8.02 -5.20 x 10-11 -0.97 View
16 330 180 109.88 2.37 +1.91 x 10-13 +0.16 View
17 430 100 53.58 4.57 +3.84 x 10-12 +0.59 View
18 280 200 311.54 3.71 +2.53 x 10-11 +0.99 View
19 280 100 97.38 9.34 +9.53 x 10-12 +0.85 View
20 280 170 189.74 1.83 -1.80 x 10-11 -0.98 View
21 310 130 314.78 2.39 -4.60 x 10-11 -1.00 View
22 240 80 412.02 3.75 +8.69 x 10-11 +1.00 View
23 400 160 120.67 4.39 +1.34 x 10-11 +0.86 View
24 290 180 221.28 3.19 +2.11 x 10-11 +0.98 View
25 340 200 259.84 3.99 +6.49 x 10-12 +0.51 View
26 290 190 173.74 1.71 +7.18 x 10-13 +0.62 View
27 230 170 279.91 5.30 +2.02 x 10-11 +0.71 View
28 --- --- ---------- ------- -------------- ------ ----
29 320 140 328.33 2.61 +4.29 x 10-11 +0.99 View
30 250 100 104.54 5.28 +7.80 x 10-12 +0.82 View
31 360 80 37.38 5.14 -1.46 x 10-12 -0.18 View
32 410 120 96.87 3.31 -7.76 x 10-13 -0.72 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.