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

Laboratory 1Instituto Nacional de Tecnologia Industrial, Buenos Aires, Argentina ID Number014End Date2021-04-25
Latitude 34° 34 min 35.819 s SCounter Delay -0.02 nsReference SourceSIMT(INTI)
Longitude 58° 30 min 56.613 s WREF Delay 5 nsMask Angle10°
Altitude43.59 mReceiver Delay124.6 nsReceiver Temp.25 °C
Laboratory 2Instituto Costarricense de Electridad (ICE), Costa RicaID Number011Baseline5434.135 km
Latitude 9° 55 min 52.809 s NCounter Delay 0.27 nsReference SourceSIMT(ICE)
Longitude 84° 3 min 22.568 s WREF Delay 30.7 nsMask Angle10°
Altitude1247.76 mReceiver Delay238.2 nsReceiver Temp.26 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -45.60 25.90 +2.65 x 10-14 +0.09




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 8.49 x 10-12
0 h, 20 min 140 4.79 x 10-12
0 h, 40 min 136 2.70 x 10-12
1 h, 20 min 128 1.27 x 10-12
2 h, 40 min 112 8.39 x 10-13
5 h, 20 min 80 4.27 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 2.94
0 h, 20 min 139 2.51
0 h, 40 min 133 2.37
1 h, 20 min 121 1.99
2 h, 40 min 97 2.92
5 h, 20 min 49 5.97


SIMT(INTI) - SIMT(ICE)
(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
1 340 180 14.50 2.21 +1.89 x 10-13 +0.18 View
2 350 150 32.94 1.90 -3.33 x 10-13 -0.92 View
3 390 220 35.14 1.51 -7.63 x 10-13 -0.72 View
4 370 150 21.19 4.11 -1.07 x 10-12 -0.54 View
5 380 120 18.16 2.72 +2.21 x 10-12 +0.84 View
6 340 110 21.06 1.39 +1.74 x 10-12 +0.69 View
7 340 180 36.13 3.39 -2.19 x 10-12 -0.70 View
8 320 200 16.64 2.51 +1.26 x 10-13 +0.11 View
9 360 120 24.02 1.58 -2.52 x 10-12 -0.93 View
10 330 170 22.43 2.16 +1.23 x 10-12 +0.62 View
11 --- --- ---------- ------- -------------- ------ ----
12 400 170 26.76 2.43 +1.28 x 10-13 +0.15 View
13 250 170 16.02 1.35 -4.46 x 10-14 -0.25 View
14 350 180 30.38 2.50 -1.05 x 10-12 -0.44 View
15 340 190 20.74 2.93 -1.57 x 10-13 -0.74 View
16 320 170 15.85 2.44 -8.21 x 10-13 -0.53 View
17 290 120 18.18 0.97 +2.96 x 10-13 +0.77 View
18 330 150 18.96 2.74 +1.03 x 10-12 +0.54 View
19 280 60 15.41 1.27 +1.37 x 10-13 +0.93 View
20 290 160 41.06 0.77 -5.82 x 10-13 -0.94 View
21 330 190 22.40 3.10 +5.68 x 10-13 +0.41 View
22 300 100 17.32 0.95 -2.14 x 10-12 -0.98 View
23 280 150 12.40 1.24 +1.90 x 10-13 +0.15 View
24 290 130 18.37 2.77 +1.32 x 10-12 +0.82 View
25 380 310 38.55 2.08 +1.72 x 10-12 +0.92 View
26 320 170 16.71 3.53 -7.38 x 10-13 -0.52 View
27 300 120 16.67 2.62 +4.94 x 10-13 +0.43 View
28 210 150 19.02 1.38 -2.16 x 10-13 -0.11 View
29 300 150 11.53 1.18 -1.34 x 10-12 -0.91 View
30 350 160 52.49 11.70 -3.60 x 10-12 -0.75 View
31 370 120 11.71 1.70 +9.82 x 10-13 +0.63 View
32 360 140 38.50 1.60 +1.15 x 10-12 +0.92 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.