SIMT(CIM) versus SIMT(CNMP) 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 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline1170.274 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 -36.56 747.36 -3.56 x 10-12 -0.53




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 2.21 x 10-11
0 h, 20 min 140 1.84 x 10-11
0 h, 40 min 136 1.98 x 10-11
1 h, 20 min 128 2.50 x 10-11
2 h, 40 min 112 2.24 x 10-11
5 h, 20 min 80 1.07 x 10-11


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 7.66
0 h, 20 min 139 10.82
0 h, 40 min 133 24.78
1 h, 20 min 121 63.55
2 h, 40 min 97 107.02
5 h, 20 min 49 61.64


SIMT(CIM) - 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
1 330 280 477.66 3.67 -3.06 x 10-11 -0.97 View
2 460 460 559.22 5.65 -1.80 x 10-11 -0.94 View
3 230 230 519.14 5.89 +4.60 x 10-11 +0.95 View
4 280 230 340.62 4.92 +2.96 x 10-12 +0.13 View
5 370 350 517.03 6.25 -3.10 x 10-11 -0.94 View
6 360 330 201.60 3.53 -1.28 x 10-11 -0.93 View
7 300 300 245.08 3.18 -4.63 x 10-12 -0.42 View
8 290 220 361.75 6.12 +2.68 x 10-11 +0.81 View
9 250 250 228.16 5.45 -1.22 x 10-11 -0.77 View
10 290 290 190.10 4.13 -9.10 x 10-13 -0.52 View
11 --- --- ---------- ------- -------------- ------ ----
12 200 190 319.28 7.02 -2.01 x 10-11 -0.76 View
13 240 210 517.06 6.45 -3.54 x 10-11 -0.90 View
14 330 330 116.90 3.09 +3.30 x 10-12 +0.61 View
15 320 320 522.31 7.16 -2.27 x 10-11 -0.72 View
16 330 320 397.80 6.44 +1.71 x 10-13 +0.03 View
17 430 310 319.26 4.19 -1.01 x 10-11 -0.92 View
18 280 260 494.27 3.84 +2.97 x 10-11 +0.98 View
19 280 200 231.45 5.78 -5.37 x 10-12 -0.75 View
20 280 260 250.39 5.98 -1.45 x 10-11 -0.97 View
21 310 270 469.75 4.02 -2.26 x 10-12 -0.37 View
22 240 180 185.17 3.95 +1.29 x 10-11 +0.84 View
23 400 330 459.51 4.34 +2.06 x 10-11 +0.98 View
24 290 180 209.10 2.38 +1.44 x 10-11 +0.97 View
25 340 260 261.03 5.64 +4.18 x 10-12 +0.56 View
26 290 280 180.14 9.13 +8.68 x 10-13 +0.62 View
27 230 230 358.52 7.06 +2.03 x 10-11 +0.80 View
28 --- --- ---------- ------- -------------- ------ ----
29 320 240 400.12 3.46 +1.79 x 10-11 +0.58 View
30 250 210 160.15 5.28 +8.85 x 10-12 +0.74 View
31 360 340 149.05 4.50 +8.61 x 10-13 +0.67 View
32 410 400 178.10 5.16 -5.37 x 10-13 -0.43 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.