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

Laboratory 1IBMETRO Bolivia ID Number025End Date2021-04-25
Latitude 16° 30 min 1.043 s SCounter Delay -0.05 nsReference SourceSIMT(IBM)
Longitude 68° 7 min 57.024 s WREF Delay 2.9 nsMask Angle10°
Altitude3649.11 mReceiver Delay103.0 nsReceiver Temp.42 °C
Laboratory 2Instituto Nacional de Tecnologia Industrial, Buenos Aires, Argentina ID Number014Baseline2209.984 km
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

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 12342.39 87.97 +1.13 x 10-12 +0.99




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 5.29 x 10-12
0 h, 20 min 140 3.22 x 10-12
0 h, 40 min 136 1.84 x 10-12
1 h, 20 min 128 9.35 x 10-13
2 h, 40 min 112 5.47 x 10-13
5 h, 20 min 80 3.18 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.83
0 h, 20 min 139 1.74
0 h, 40 min 133 1.62
1 h, 20 min 121 1.30
2 h, 40 min 97 1.72
5 h, 20 min 49 3.97


SIMT(IBM) - SIMT(INTI)
(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
1 340 310 42.55 1.99 +2.07 x 10-12 +0.94 View
2 280 180 102.30 2.08 +1.57 x 10-12 +0.99 View
3 310 280 34.42 3.18 +1.52 x 10-12 +0.91 View
4 290 250 23.18 3.06 +2.18 x 10-13 +0.29 View
5 290 220 101.34 2.32 +1.56 x 10-12 +0.99 View
6 260 200 92.23 2.34 +1.42 x 10-12 +0.99 View
7 350 290 22.69 2.50 +4.59 x 10-14 +0.05 View
8 310 250 41.05 2.96 +2.12 x 10-12 +0.85 View
9 330 290 15.47 1.62 +3.35 x 10-13 +0.55 View
10 320 260 20.53 3.30 -7.05 x 10-13 -0.52 View
11 --- --- ---------- ------- -------------- ------ ----
12 310 280 17.06 2.84 -2.59 x 10-13 -0.32 View
13 330 200 99.66 1.55 +1.11 x 10-12 +0.99 View
14 300 260 19.02 1.98 -3.11 x 10-13 -0.27 View
15 320 250 103.00 3.03 +9.85 x 10-13 +0.99 View
16 170 90 6.62 1.41 -9.04 x 10-13 -0.69 View
17 280 170 112.04 7.22 +1.27 x 10-12 +0.98 View
18 340 270 19.08 2.19 -5.78 x 10-13 -0.57 View
19 220 150 96.27 2.56 +1.13 x 10-12 +1.00 View
20 260 160 12.66 3.24 -9.06 x 10-14 -0.11 View
21 270 260 38.23 1.25 +2.22 x 10-12 +0.98 View
22 140 100 16.08 0.86 +7.80 x 10-13 +0.86 View
23 260 200 15.09 1.48 -8.82 x 10-13 -0.71 View
24 270 260 31.38 2.07 +1.12 x 10-12 +0.81 View
25 380 340 35.72 2.43 +8.80 x 10-13 +0.81 View
26 300 220 27.77 3.41 +2.20 x 10-12 +0.89 View
27 320 260 31.08 1.94 +1.67 x 10-12 +0.90 View
28 240 190 25.01 1.75 -2.07 x 10-13 -0.13 View
29 310 270 22.40 2.12 -9.68 x 10-13 -0.73 View
30 310 240 21.63 3.70 -3.79 x 10-13 -0.43 View
31 250 220 22.11 2.63 +3.79 x 10-13 +0.87 View
32 290 190 36.95 3.60 +7.24 x 10-13 +0.83 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.