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

Laboratory 1INACAL PeruID Number019End Date2021-09-13
Latitude 12° 5 min 7.520 s SCounter Delay 0.02 nsReference SourceSIMT(INCP)
Longitude 77° 0 min 26.262 s WREF Delay 7.7 nsMask Angle10°
Altitude198.84 mReceiver Delay100.9 nsReceiver Temp.32 °C
Laboratory 2IBMETRO Bolivia ID Number025Baseline1073.701 km
Latitude 16° 30 min 1.070 s SCounter Delay 0.01 nsReference SourceSIMT(IBM)
Longitude 68° 7 min 56.998 s WREF Delay 2.9 nsMask Angle10°
Altitude3648.75 mReceiver Delay103.0 nsReceiver Temp.41 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -146.01 15.45 -1.86 x 10-13 -0.93




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 139 4.00 x 10-12
0 h, 20 min 137 2.48 x 10-12
0 h, 40 min 133 1.17 x 10-12
1 h, 20 min 125 5.82 x 10-13
2 h, 40 min 109 2.97 x 10-13
5 h, 20 min 77 1.48 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 139 1.39
0 h, 20 min 136 1.29
0 h, 40 min 130 0.96
1 h, 20 min 118 1.05
2 h, 40 min 94 1.03
5 h, 20 min 46 0.92


SIMT(INCP) - SIMT(IBM)
(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
1 330 320 18.00 1.46 +6.14 x 10-13 +0.71 View
2 460 260 21.71 2.86 -7.10 x 10-14 -0.18 View
3 440 310 12.48 2.10 +4.84 x 10-15 +0.01 View
4 290 240 11.38 1.38 -3.12 x 10-13 -0.54 View
5 320 190 13.27 2.46 +4.03 x 10-13 +0.40 View
6 310 200 22.85 2.68 +6.58 x 10-14 +0.10 View
7 320 300 22.18 2.20 -9.78 x 10-13 -0.90 View
8 310 310 17.44 2.04 +6.35 x 10-13 +0.71 View
9 460 310 32.33 2.33 -1.41 x 10-13 -0.15 View
10 320 260 15.94 1.00 -1.02 x 10-13 -0.87 View
11 --- --- ---------- ------- -------------- ------ ----
12 480 300 16.38 3.04 -1.95 x 10-13 -0.25 View
13 350 320 19.95 2.96 +1.86 x 10-13 +0.23 View
14 270 250 17.99 2.38 -6.48 x 10-13 -0.79 View
15 310 300 19.09 1.73 +3.87 x 10-13 +0.55 View
16 280 260 32.34 1.56 -2.98 x 10-13 -0.95 View
17 370 140 34.38 6.72 +1.52 x 10-13 +0.24 View
18 330 290 18.05 1.24 -1.03 x 10-12 -0.88 View
19 210 110 23.05 1.36 +1.31 x 10-13 +0.19 View
20 270 240 13.83 1.35 +6.53 x 10-13 +0.70 View
21 240 240 14.53 1.68 +7.72 x 10-13 +0.84 View
22 330 130 12.09 4.38 +4.14 x 10-14 +0.08 View
23 200 200 14.59 1.24 -9.52 x 10-14 -0.85 View
24 330 240 15.87 2.56 +3.15 x 10-13 +0.52 View
25 380 350 20.53 3.14 +1.70 x 10-13 +0.26 View
26 320 300 39.11 1.87 -2.91 x 10-13 -0.92 View
27 220 220 42.55 1.13 -3.21 x 10-13 -0.55 View
28 --- --- ---------- ------- -------------- ------ ----
29 390 320 49.22 2.44 -8.55 x 10-13 -0.58 View
30 230 190 20.95 1.22 -8.76 x 10-13 -0.78 View
31 350 180 15.63 2.51 -1.86 x 10-13 -0.84 View
32 480 290 58.54 3.63 -2.48 x 10-13 -0.71 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.