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 Date2021-04-23
Latitude 16° 30 min 1.043 s SCounter Delay -0.00 nsReference SourceSIMT(IBM)
Longitude 68° 7 min 57.024 s WREF Delay 2.9 nsMask Angle10°
Altitude3649.11 mReceiver Delay103.0 nsReceiver Temp.39 °C
Laboratory 2Instituto Nacional de Tecnologia Industrial, Buenos Aires, Argentina ID Number014Baseline2209.984 km
Latitude 34° 34 min 35.819 s SCounter Delay -0.04 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 12151.31 89.69 +1.14 x 10-12 +0.99




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 5.38 x 10-12
0 h, 20 min 140 3.68 x 10-12
0 h, 40 min 136 1.86 x 10-12
1 h, 20 min 128 9.07 x 10-13
2 h, 40 min 112 4.60 x 10-13
5 h, 20 min 80 2.73 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.87
0 h, 20 min 139 1.93
0 h, 40 min 133 1.68
1 h, 20 min 121 1.28
2 h, 40 min 97 1.28
5 h, 20 min 49 2.65


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 44.32 1.62 +2.14 x 10-12 +0.97 View
2 260 180 99.05 2.30 +1.45 x 10-12 +0.98 View
3 320 270 24.65 2.18 +8.89 x 10-13 +0.77 View
4 300 250 22.14 2.37 -7.22 x 10-13 -0.74 View
5 290 210 104.93 1.74 +1.59 x 10-12 +0.99 View
6 270 190 96.60 2.98 +1.47 x 10-12 +0.99 View
7 350 290 37.35 2.76 -1.57 x 10-12 -0.81 View
8 320 260 47.57 2.85 +2.54 x 10-12 +0.90 View
9 320 280 20.69 2.42 -6.44 x 10-13 -0.63 View
10 330 260 17.76 1.77 -6.26 x 10-13 -0.55 View
11 --- --- ---------- ------- -------------- ------ ----
12 320 290 16.34 1.47 -2.14 x 10-14 -0.04 View
13 330 270 99.65 2.70 +1.04 x 10-12 +0.99 View
14 310 270 120.51 3.09 +1.24 x 10-12 +0.94 View
15 320 240 95.03 2.36 +9.43 x 10-13 +0.99 View
16 170 100 4.66 0.86 -1.78 x 10-13 -0.22 View
17 250 130 118.24 6.42 +1.49 x 10-12 +0.98 View
18 340 290 27.69 3.83 -8.13 x 10-13 -0.68 View
19 200 130 106.85 2.32 +1.21 x 10-12 +0.99 View
20 290 180 14.57 2.29 -2.44 x 10-13 -0.23 View
21 270 260 34.94 1.60 +2.06 x 10-12 +0.98 View
22 140 100 24.61 1.32 +8.65 x 10-13 +0.81 View
23 250 200 17.31 2.46 -7.97 x 10-13 -0.68 View
24 240 200 29.30 1.56 +1.40 x 10-12 +0.75 View
25 380 340 45.83 2.15 +1.04 x 10-12 +0.81 View
26 310 190 35.49 3.32 +2.59 x 10-12 +0.94 View
27 320 240 33.09 1.13 +2.03 x 10-12 +0.95 View
28 230 200 118.39 1.47 +1.32 x 10-12 +0.98 View
29 310 280 22.56 1.95 -9.27 x 10-13 -0.78 View
30 320 250 27.71 2.16 -8.63 x 10-13 -0.66 View
31 270 220 33.56 2.34 +6.81 x 10-13 +0.90 View
32 280 190 41.13 3.95 +8.37 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.