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 Date2021-04-23
Latitude 14° 1 min 26.419 s NCounter Delay -0.26 nsReference SourceSIMT(SLBS)
Longitude 60° 58 min 33.714 s WREF Delay 0 nsMask Angle10°
Altitude13.49 mReceiver Delay58.1 nsReceiver Temp.36 °C
Laboratory 2INACAL PeruID Number019Baseline3346.291 km
Latitude 12° 5 min 7.520 s SCounter Delay 0.05 nsReference SourceSIMT(INCP)
Longitude 77° 0 min 26.262 s WREF Delay 7.7 nsMask Angle10°
Altitude198.84 mReceiver Delay100.9 nsReceiver Temp.30 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -160.77 558.80 -2.81 x 10-13 -0.05




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 141 1.75 x 10-11
0 h, 20 min 139 2.20 x 10-11
0 h, 40 min 135 2.19 x 10-11
1 h, 20 min 127 2.79 x 10-11
2 h, 40 min 111 2.34 x 10-11
5 h, 20 min 79 1.27 x 10-11


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 141 6.05
0 h, 20 min 138 13.34
0 h, 40 min 132 26.68
1 h, 20 min 120 70.51
2 h, 40 min 96 105.18
5 h, 20 min 48 128.21


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
1 280 210 424.90 11.52 +1.27 x 10-11 +0.39 View
2 490 340 272.99 3.83 +1.47 x 10-12 +0.58 View
3 380 220 371.20 3.78 +1.24 x 10-11 +0.91 View
4 280 240 441.86 9.27 +2.73 x 10-11 +0.77 View
5 460 190 183.00 10.65 -2.73 x 10-13 -0.20 View
6 440 160 307.59 2.40 +4.10 x 10-12 +0.96 View
7 280 240 220.20 4.85 -9.41 x 10-12 -0.60 View
8 280 160 358.28 12.63 +3.52 x 10-11 +0.84 View
9 450 240 380.32 10.68 +4.14 x 10-12 +0.35 View
10 310 240 270.56 4.03 -1.46 x 10-11 -0.94 View
11 --- --- ---------- ------- -------------- ------ ----
12 390 300 445.61 9.95 +9.24 x 10-14 +0.02 View
13 340 240 246.62 5.44 +4.61 x 10-13 +0.19 View
14 250 230 184.61 2.15 -1.23 x 10-11 -0.80 View
15 360 210 316.55 3.10 +1.63 x 10-11 +0.65 View
16 400 220 196.45 5.95 -1.28 x 10-11 -0.90 View
17 390 210 165.48 8.18 +6.50 x 10-14 +0.05 View
18 310 220 344.74 3.96 -2.38 x 10-11 -0.82 View
19 310 160 168.22 12.82 +2.39 x 10-13 +0.19 View
20 360 270 535.19 4.94 +1.11 x 10-11 +0.44 View
21 240 50 32.92 7.65 +8.96 x 10-12 +0.65 View
22 410 230 420.71 7.99 +1.19 x 10-11 +0.75 View
23 290 220 329.96 2.57 -2.69 x 10-11 -0.96 View
24 260 230 552.33 4.63 +4.80 x 10-11 +0.99 View
25 240 150 275.65 4.07 -2.78 x 10-11 -0.99 View
26 400 230 120.02 5.63 -5.50 x 10-12 -0.69 View
27 270 220 186.53 2.51 -1.71 x 10-11 -0.96 View
28 240 190 185.91 1.91 -1.97 x 10-11 -0.97 View
29 350 150 358.05 2.58 +5.76 x 10-12 +0.23 View
30 270 90 94.22 2.48 +2.14 x 10-11 +0.97 View
31 460 280 402.53 3.49 -1.45 x 10-11 -0.98 View
32 410 240 459.72 5.79 -1.79 x 10-11 -0.98 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.