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

Laboratory 1St. Lucia Bureau of Standards (SLBS) ID Number021End Date2021-04-25
Latitude 14° 1 min 26.419 s NCounter Delay -2.83 nsReference SourceSIMT(SLBS)
Longitude 60° 58 min 33.714 s WREF Delay 0 nsMask Angle10°
Altitude13.49 mReceiver Delay58.1 nsReceiver Temp.38 °C
Laboratory 2INACAL PeruID Number019Baseline3346.291 km
Latitude 12° 5 min 7.520 s SCounter Delay 0.35 nsReference SourceSIMT(INCP)
Longitude 77° 0 min 26.262 s WREF Delay 7.7 nsMask Angle10°
Altitude198.84 mReceiver Delay100.9 nsReceiver Temp.33 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -164.98 496.11 +1.83 x 10-12 +0.40




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 1.83 x 10-11
0 h, 20 min 140 2.37 x 10-11
0 h, 40 min 136 3.12 x 10-11
1 h, 20 min 128 3.29 x 10-11
2 h, 40 min 112 1.57 x 10-11
5 h, 20 min 80 8.42 x 10-12


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 6.32
0 h, 20 min 139 15.09
0 h, 40 min 133 39.56
1 h, 20 min 121 71.33
2 h, 40 min 97 71.43
5 h, 20 min 49 75.35


SIMT(SLBS) - SIMT(INCP)
(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
1 280 210 218.26 7.75 +9.75 x 10-12 +0.49 View
2 490 320 363.87 6.50 +2.81 x 10-12 +0.88 View
3 380 220 324.70 10.29 -9.57 x 10-12 -0.88 View
4 290 240 384.21 6.89 -2.92 x 10-11 -0.85 View
5 470 210 358.61 5.26 +2.90 x 10-12 +0.90 View
6 420 150 391.71 9.72 +3.94 x 10-12 +0.42 View
7 280 240 202.52 6.32 -1.07 x 10-12 -0.07 View
8 280 170 358.68 6.46 -3.71 x 10-11 -0.83 View
9 440 270 405.28 8.55 +8.10 x 10-12 +0.51 View
10 310 240 49.70 1.42 -3.22 x 10-12 -0.82 View
11 --- --- ---------- ------- -------------- ------ ----
12 390 300 364.67 3.28 +2.50 x 10-12 +0.60 View
13 340 250 379.18 3.90 +1.99 x 10-12 +0.57 View
14 320 250 375.81 10.62 +8.68 x 10-12 +0.32 View
15 360 210 209.63 2.78 +1.37 x 10-11 +0.88 View
16 390 220 315.86 6.61 +2.36 x 10-11 +0.75 View
17 330 230 473.82 5.64 +4.55 x 10-12 +0.94 View
18 310 220 16.59 1.39 -2.56 x 10-13 -0.21 View
19 260 130 401.34 5.09 +4.34 x 10-12 +0.98 View
20 370 290 235.07 2.95 +6.21 x 10-12 +0.86 View
21 240 50 46.02 6.90 -1.56 x 10-11 -0.78 View
22 340 230 407.50 8.32 -9.75 x 10-12 -0.64 View
23 290 220 42.06 1.62 -2.45 x 10-12 -0.74 View
24 260 230 120.05 1.56 +8.87 x 10-12 +0.97 View
25 240 150 72.00 1.50 +6.63 x 10-12 +0.97 View
26 400 230 310.07 5.92 +2.59 x 10-11 +0.87 View
27 270 220 224.86 6.42 -7.67 x 10-13 -0.05 View
28 240 190 251.51 5.62 -1.64 x 10-11 -0.65 View
29 340 140 13.71 0.86 +9.53 x 10-13 +0.77 View
30 330 150 374.89 9.58 +3.83 x 10-11 +0.87 View
31 460 270 206.90 3.84 +7.25 x 10-12 +0.97 View
32 400 240 286.23 5.89 +1.30 x 10-11 +0.75 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.