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 Date2021-04-25
Latitude 9° 0 min 3.590 s NCounter Delay -0.01 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 2.09 nsReference SourceSIMT(CNM)
Longitude100° 15 min 16.831 s WREF Delay 8.6 nsMask Angle10°
Altitude1928.65 mReceiver Delay140.3 nsReceiver Temp.31° C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -15.41 18.09 +1.85 x 10-13 +0.82




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 3.42 x 10-12
0 h, 20 min 140 2.09 x 10-12
0 h, 40 min 136 1.14 x 10-12
1 h, 20 min 128 7.75 x 10-13
2 h, 40 min 112 4.08 x 10-13
5 h, 20 min 80 2.16 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.18
0 h, 20 min 139 1.06
0 h, 40 min 133 1.05
1 h, 20 min 121 1.43
2 h, 40 min 97 1.58
5 h, 20 min 49 1.67


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 11.49 1.65 +4.27 x 10-13 +0.45 View
2 530 380 35.07 1.96 +9.74 x 10-14 +0.37 View
3 480 220 15.89 1.89 +7.66 x 10-13 +0.81 View
4 200 140 17.82 1.89 +1.72 x 10-12 +0.84 View
5 380 280 29.94 1.94 +1.93 x 10-13 +0.77 View
6 360 320 21.87 1.31 +2.68 x 10-13 +0.25 View
7 330 270 23.59 1.43 +1.30 x 10-12 +0.88 View
8 300 240 17.66 1.90 -4.54 x 10-13 -0.49 View
9 270 230 18.00 1.59 +1.01 x 10-12 +0.77 View
10 340 270 15.20 2.15 +3.77 x 10-15 0.00 View
11 --- --- ---------- ------- -------------- ------ ----
12 400 250 31.78 2.15 +1.47 x 10-14 +0.07 View
13 330 250 28.80 2.13 +2.89 x 10-13 +0.79 View
14 380 330 27.08 1.25 +1.16 x 10-12 +0.95 View
15 350 250 20.53 3.78 -4.30 x 10-13 -0.43 View
16 340 290 18.85 2.11 +5.97 x 10-13 +0.58 View
17 420 380 24.67 2.67 +9.27 x 10-13 +0.80 View
18 330 280 15.77 2.18 +2.78 x 10-13 +0.32 View
19 250 230 19.27 1.54 +3.54 x 10-13 +0.46 View
20 340 250 43.16 1.37 +4.75 x 10-13 +0.94 View
21 330 200 24.48 2.26 +4.47 x 10-13 +0.79 View
22 190 190 20.80 1.50 +1.70 x 10-12 +0.95 View
23 370 270 14.97 2.01 +1.88 x 10-13 +0.38 View
24 360 270 40.70 1.73 +4.56 x 10-13 +0.96 View
25 310 210 19.61 2.04 +1.68 x 10-13 +0.51 View
26 310 200 17.75 2.55 +3.32 x 10-13 +0.40 View
27 330 240 15.10 1.82 -5.62 x 10-13 -0.52 View
28 260 130 12.03 1.57 +1.36 x 10-12 +0.89 View
29 300 260 17.93 1.40 +3.12 x 10-13 +0.32 View
30 240 190 31.90 1.96 +1.74 x 10-12 +0.91 View
31 430 350 29.11 2.85 +5.80 x 10-13 +0.47 View
32 520 420 31.85 1.93 +3.44 x 10-13 +0.47 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.