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

Laboratory 1Instituto Nacional de Metrologia (INM)ID Number012End Date2021-09-13
Latitude 4° 38 min 34.643 s NCounter Delay 0.30 nsReference SourceSIMT(INM)
Longitude 74° 5 min 32.593 s WREF Delay 60.9 nsMask Angle10°
Altitude2611.11 mReceiver Delay128.2 nsReceiver Temp.27 °C
Laboratory 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline774.737 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 -144.87 4.89 -1.64 x 10-14 -0.30




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 4.92 x 10-12
0 h, 20 min 140 3.31 x 10-12
0 h, 40 min 136 2.00 x 10-12
1 h, 20 min 128 7.69 x 10-13
2 h, 40 min 112 3.90 x 10-13
5 h, 20 min 80 1.79 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.70
0 h, 20 min 139 1.79
0 h, 40 min 133 1.72
1 h, 20 min 121 0.95
2 h, 40 min 97 1.15
5 h, 20 min 49 0.29


SIMT(INM) - 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
1 250 250 39.62 1.81 +1.58 x 10-12 +0.80 View
2 520 520 23.78 1.96 -1.49 x 10-13 -0.21 View
3 570 430 36.08 2.72 -2.23 x 10-13 -0.27 View
4 220 220 27.50 2.65 -1.52 x 10-12 -0.74 View
5 440 380 27.81 3.26 -7.89 x 10-13 -0.74 View
6 420 360 19.84 3.77 -1.74 x 10-13 -0.21 View
7 310 310 43.14 2.60 -1.01 x 10-12 -0.55 View
8 230 230 37.85 2.58 +2.75 x 10-12 +0.90 View
9 440 340 30.94 2.92 -6.76 x 10-13 -0.78 View
10 360 340 51.77 2.14 +3.88 x 10-13 +0.90 View
11 --- --- ---------- ------- -------------- ------ ----
12 490 350 28.86 2.35 -4.16 x 10-13 -0.68 View
13 200 160 28.12 1.05 +1.53 x 10-12 +0.78 View
14 300 290 29.80 1.87 -1.03 x 10-12 -0.66 View
15 350 330 26.77 3.27 +4.88 x 10-13 +0.39 View
16 360 340 47.92 3.21 -2.93 x 10-13 -0.67 View
17 370 310 24.75 1.80 +4.55 x 10-14 +0.09 View
18 330 290 53.01 2.89 -1.58 x 10-12 -0.63 View
19 310 260 12.41 2.85 -2.20 x 10-14 -0.06 View
20 340 300 29.65 1.68 +4.01 x 10-14 +0.03 View
21 290 250 40.72 2.12 +1.86 x 10-12 +0.78 View
22 440 340 41.74 2.70 -6.52 x 10-13 -0.62 View
23 360 310 54.04 2.04 +4.60 x 10-13 +0.69 View
24 320 250 32.91 1.18 +1.51 x 10-12 +0.79 View
25 410 310 36.15 2.33 +8.17 x 10-13 +0.67 View
26 350 340 56.98 2.96 -2.82 x 10-13 -0.70 View
27 320 280 38.61 2.22 +1.54 x 10-12 +0.73 View
28 --- --- ---------- ------- -------------- ------ ----
29 290 220 34.78 2.26 -2.14 x 10-12 -0.87 View
30 290 210 40.68 3.64 -2.23 x 10-12 -0.82 View
31 480 450 40.48 3.41 -1.61 x 10-15 -0.01 View
32 470 470 41.80 1.93 +8.19 x 10-14 +0.28 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.