SIMT(SLBS) versus SIMT(INTI) 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 Date2021-04-24
Latitude 14° 1 min 26.419 s NCounter Delay -0.28 nsReference SourceSIMT(SLBS)
Longitude 60° 58 min 33.714 s WREF Delay 0 nsMask Angle10°
Altitude13.49 mReceiver Delay58.1 nsReceiver Temp.37 °C
Laboratory 2Instituto Nacional de Tecnologia Industrial, Buenos Aires, Argentina ID Number014Baseline5224.520 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)
24 125.44 709.86 +4.84 x 10-13 +0.07




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 141 2.87 x 10-11
0 h, 20 min 139 3.82 x 10-11
0 h, 40 min 135 4.42 x 10-11
1 h, 20 min 127 5.29 x 10-11
2 h, 40 min 111 4.02 x 10-11
5 h, 20 min 79 9.77 x 10-12


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 141 9.94
0 h, 20 min 138 23.81
0 h, 40 min 132 55.34
1 h, 20 min 120 131.78
2 h, 40 min 96 143.54
5 h, 20 min 48 57.41


SIMT(SLBS) - 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
1 270 170 752.05 21.07 -8.16 x 10-11 -0.88 View
2 480 150 202.21 2.68 +2.19 x 10-11 +0.88 View
3 370 160 726.38 22.93 +7.90 x 10-11 +0.97 View
4 290 160 666.98 11.23 -2.75 x 10-11 -0.38 View
5 460 120 469.52 10.80 -5.29 x 10-12 -0.91 View
6 400 60 511.20 2.52 +6.54 x 10-12 +0.92 View
7 280 160 654.92 22.41 +6.93 x 10-11 +0.96 View
8 290 100 497.91 6.67 +9.88 x 10-11 +0.99 View
9 440 180 778.68 8.51 +7.52 x 10-12 +0.30 View
10 320 170 25.38 1.63 +1.85 x 10-12 +0.72 View
11 --- --- ---------- ------- -------------- ------ ----
12 410 230 305.01 3.94 +2.10 x 10-12 +0.24 View
13 340 190 577.65 7.68 -5.05 x 10-12 -0.86 View
14 270 180 621.76 7.74 -5.68 x 10-11 -0.97 View
15 350 120 179.42 4.57 -2.26 x 10-11 -0.84 View
16 380 140 144.32 3.30 -5.83 x 10-12 -0.35 View
17 400 60 281.13 17.54 -2.75 x 10-12 -0.95 View
18 300 170 188.22 2.56 -2.25 x 10-11 -0.99 View
19 290 130 545.27 8.52 -5.23 x 10-12 -0.95 View
20 340 120 180.97 1.14 -2.34 x 10-11 -1.00 View
21 240 130 573.31 24.21 -1.54 x 10-11 -0.32 View
22 410 110 366.91 20.96 +1.18 x 10-11 +0.70 View
23 280 140 22.57 1.53 -1.35 x 10-12 -0.44 View
24 250 180 353.59 5.15 +3.72 x 10-11 +0.97 View
25 240 120 93.90 2.43 -1.04 x 10-11 -0.99 View
26 400 140 93.63 2.00 +1.30 x 10-11 +0.97 View
27 270 160 254.80 5.14 -1.50 x 10-11 -0.55 View
28 230 140 578.15 11.63 -6.64 x 10-11 -0.97 View
29 360 140 201.98 4.17 +1.53 x 10-13 +0.01 View
30 220 80 243.22 0.82 +9.32 x 10-13 +0.35 View
31 460 120 305.27 12.31 +5.38 x 10-12 +0.69 View
32 410 160 320.64 5.30 -4.38 x 10-11 -0.97 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.