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

Laboratory 1Observatorio NacionalID Number010End Date2021-09-13
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
Laboratory 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline5152.964 km
Latitude 9° 0 min 3.590 s NCounter Delay -0.10 nsReference SourceSIMT(CNMP)
Longitude 79° 35 min 5.880 s WREF Delay 45.66 nsMask Angle10°
Altitude47.23 mReceiver Delay122.1 nsReceiver Temp.27 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 12.49 28.38 -4.93 x 10-14 -0.16




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 5.38 x 10-12
0 h, 20 min 140 3.49 x 10-12
0 h, 40 min 136 1.88 x 10-12
1 h, 20 min 128 1.04 x 10-12
2 h, 40 min 112 7.42 x 10-13
5 h, 20 min 80 4.20 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.86
0 h, 20 min 139 1.87
0 h, 40 min 133 1.54
1 h, 20 min 121 1.84
2 h, 40 min 97 2.77
5 h, 20 min 49 5.94


SIMT(ONRJ) - SIMT(CNMP)
(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
1 310 260 28.89 3.19 +1.18 x 10-12 +0.76 View
2 280 150 13.92 1.75 -1.01 x 10-12 -0.77 View
3 360 220 29.79 2.89 +1.29 x 10-12 +0.92 View
4 440 170 10.87 2.64 +3.44 x 10-13 +0.26 View
5 400 180 25.07 3.63 -3.08 x 10-13 -0.46 View
6 370 130 22.81 1.90 +7.12 x 10-13 +0.89 View
7 440 200 14.48 2.47 +1.40 x 10-13 +0.10 View
8 410 240 32.59 2.63 +2.06 x 10-12 +0.93 View
9 430 210 22.17 3.94 +4.62 x 10-13 +0.69 View
10 380 210 25.83 2.17 +1.58 x 10-13 +0.84 View
11 --- --- ---------- ------- -------------- ------ ----
12 340 210 27.40 3.57 -7.19 x 10-13 -0.56 View
13 310 180 13.42 1.46 -6.90 x 10-15 -0.01 View
14 410 220 11.86 1.07 +5.37 x 10-13 +0.57 View
15 440 210 20.19 1.84 -4.78 x 10-13 -0.32 View
16 370 200 34.89 1.92 -1.07 x 10-13 -0.45 View
17 320 160 9.44 1.35 +7.18 x 10-13 +0.72 View
18 470 220 26.83 2.97 -1.15 x 10-12 -0.63 View
19 330 100 10.92 2.45 -2.51 x 10-13 -0.18 View
20 430 150 14.49 2.01 +1.09 x 10-13 +0.09 View
21 260 210 25.17 2.22 +1.58 x 10-12 +0.86 View
22 380 170 22.31 2.46 +5.28 x 10-13 +0.55 View
23 360 210 24.00 1.65 +1.91 x 10-13 +0.70 View
24 260 150 20.30 1.15 -7.26 x 10-13 -0.55 View
25 350 330 24.37 2.22 +6.32 x 10-13 +0.52 View
26 440 240 39.02 2.00 -2.07 x 10-13 -0.67 View
27 220 190 16.76 2.49 +1.18 x 10-12 +0.79 View
28 --- --- ---------- ------- -------------- ------ ----
29 400 160 27.00 2.94 -2.91 x 10-12 -0.94 View
30 260 130 12.63 3.13 -2.87 x 10-13 -0.29 View
31 360 170 38.72 2.43 -3.33 x 10-13 -0.85 View
32 340 210 24.14 1.45 +1.09 x 10-13 +0.37 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.