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

Laboratory 1Instituto Costarricense de Electridad (ICE), Costa RicaID Number011End Date2021-09-13
Latitude 9° 55 min 52.809 s NCounter Delay 0.28 nsReference SourceSIMT(ICE)
Longitude 84° 3 min 22.568 s WREF Delay 30.7 nsMask Angle10°
Altitude1247.76 mReceiver Delay238.2 nsReceiver Temp.25 °C
Laboratory 2Centro Nacional de Metrologia de Panama AIPID Number009Baseline501.590 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 -47.02 6.25 -1.44 x 10-14 -0.22




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 4.03 x 10-12
0 h, 20 min 140 2.21 x 10-12
0 h, 40 min 136 1.23 x 10-12
1 h, 20 min 128 6.99 x 10-13
2 h, 40 min 112 3.52 x 10-13
5 h, 20 min 80 1.29 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.40
0 h, 20 min 139 1.14
0 h, 40 min 133 1.01
1 h, 20 min 121 1.15
2 h, 40 min 97 0.90
5 h, 20 min 49 0.70


SIMT(ICE) - 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
1 320 260 17.02 2.59 +2.72 x 10-13 +0.28 View
2 520 510 15.56 3.13 +3.80 x 10-14 +0.10 View
3 400 400 17.18 2.74 +1.08 x 10-13 +0.32 View
4 320 240 21.09 3.10 +2.38 x 10-13 +0.21 View
5 400 390 15.52 3.62 -5.09 x 10-16 0.00 View
6 380 360 15.98 3.57 +2.71 x 10-13 +0.41 View
7 300 290 19.97 2.95 +2.32 x 10-13 +0.28 View
8 240 230 11.82 3.08 +5.07 x 10-13 +0.54 View
9 290 270 16.51 2.91 -5.62 x 10-14 -0.06 View
10 410 360 19.30 3.43 +4.58 x 10-14 +0.41 View
11 --- --- ---------- ------- -------------- ------ ----
12 380 370 19.20 4.22 +8.88 x 10-14 +0.22 View
13 240 230 13.44 2.48 +1.60 x 10-13 +0.25 View
14 450 350 17.56 1.94 +3.13 x 10-13 +0.41 View
15 330 320 18.82 3.63 -1.79 x 10-13 -0.21 View
16 330 330 18.93 3.17 +7.70 x 10-14 +0.41 View
17 400 350 23.06 3.94 +1.41 x 10-13 +0.30 View
18 290 260 27.04 2.69 +7.65 x 10-13 +0.65 View
19 320 250 22.19 3.86 +1.75 x 10-14 +0.03 View
20 330 320 14.01 2.41 -2.30 x 10-14 -0.03 View
21 460 350 16.07 2.45 -2.36 x 10-14 -0.15 View
22 280 230 18.27 2.75 +6.61 x 10-14 +0.17 View
23 470 380 21.86 2.55 -2.97 x 10-14 -0.09 View
24 320 210 24.64 2.65 -5.59 x 10-13 -0.47 View
25 480 420 16.70 3.17 -1.35 x 10-14 -0.04 View
26 350 340 19.67 3.85 -2.42 x 10-14 -0.18 View
27 290 280 26.93 3.41 -4.96 x 10-15 0.00 View
28 --- --- ---------- ------- -------------- ------ ----
29 270 250 15.62 3.61 -2.35 x 10-13 -0.24 View
30 280 250 16.41 3.28 -2.52 x 10-13 -0.31 View
31 350 350 19.26 3.59 -5.03 x 10-14 -0.43 View
32 440 430 25.72 4.29 -5.12 x 10-15 -0.04 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.