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

Laboratory 1Centro Nacional de Metrologia de Panama AIPID Number009End Date2021-04-23
Latitude 9° 0 min 3.590 s NCounter Delay -0.04 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
Laboratory 2Centro Nacional de MetrologiaID Number007Baseline2544.047 km
Latitude 20° 32 min 13.284 s NCounter Delay 2.11 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 -27.62 15.20 +8.44 x 10-14 +0.64




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 3.55 x 10-12
0 h, 20 min 140 2.24 x 10-12
0 h, 40 min 136 1.30 x 10-12
1 h, 20 min 128 8.19 x 10-13
2 h, 40 min 112 4.25 x 10-13
5 h, 20 min 80 2.50 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.23
0 h, 20 min 139 1.16
0 h, 40 min 133 1.21
1 h, 20 min 121 1.46
2 h, 40 min 97 1.51
5 h, 20 min 49 2.27


SIMT(CNMP) - 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
1 300 180 11.86 1.73 +2.10 x 10-13 +0.23 View
2 520 370 24.28 2.17 +2.35 x 10-14 +0.14 View
3 490 220 8.51 1.65 +3.15 x 10-13 +0.45 View
4 200 140 17.22 1.32 +1.59 x 10-12 +0.84 View
5 380 230 22.29 2.49 +1.08 x 10-13 +0.67 View
6 350 310 22.78 1.98 +2.79 x 10-13 +0.25 View
7 330 280 20.19 1.84 +9.79 x 10-13 +0.89 View
8 320 260 26.76 2.31 -1.05 x 10-12 -0.69 View
9 260 220 17.89 1.05 +9.96 x 10-13 +0.77 View
10 340 270 22.64 1.96 +1.09 x 10-12 +0.86 View
11 --- --- ---------- ------- -------------- ------ ----
12 420 250 19.15 1.92 +2.33 x 10-14 +0.16 View
13 330 250 16.99 1.54 -1.34 x 10-13 -0.54 View
14 370 310 17.12 1.53 +6.13 x 10-13 +0.79 View
15 350 300 22.71 3.25 -3.10 x 10-13 -0.26 View
16 330 290 17.43 2.66 -5.85 x 10-15 -0.01 View
17 400 340 22.83 1.72 +7.46 x 10-13 +0.71 View
18 330 280 18.09 2.02 +8.07 x 10-13 +0.70 View
19 240 220 20.71 1.13 -3.77 x 10-13 -0.50 View
20 400 310 22.61 1.95 +1.32 x 10-13 +0.40 View
21 370 250 15.43 2.81 +1.34 x 10-13 +0.42 View
22 190 190 17.52 1.91 +1.29 x 10-12 +0.88 View
23 380 280 21.70 2.26 +8.18 x 10-13 +0.89 View
24 360 210 44.55 1.64 +6.15 x 10-13 +0.98 View
25 340 190 18.18 3.24 +2.41 x 10-13 +0.67 View
26 310 200 14.17 2.92 -1.66 x 10-13 -0.22 View
27 330 240 16.15 1.53 -8.86 x 10-13 -0.80 View
28 250 130 7.63 1.33 +5.20 x 10-13 +0.56 View
29 300 180 23.92 0.56 +6.90 x 10-13 +0.49 View
30 250 200 21.08 2.47 +7.94 x 10-13 +0.76 View
31 430 340 21.34 2.29 +2.71 x 10-13 +0.27 View
32 520 420 31.53 2.20 +6.92 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.