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

Laboratory 1INDOCAL Dominican RepublicID Number029End Date2021-09-13
Latitude 18° 27 min 57.917 s NCounter Delay 0.40 nsReference SourceSIMT(INDC)
Longitude 69° 53 min 44.116 s WREF Delay 0 nsMask Angle10°
Altitude1.44 mReceiver Delay11.3 nsReceiver Temp.28 °C
Laboratory 2Antigua and Barbuda Bureau of StandardsID Number023Baseline868.022 km
Latitude 17° 7 min 34.395 s NCounter Delay 0.24 nsReference SourceSIMT(ABBS)
Longitude 61° 49 min 18.409 s WREF Delay 1.7 nsMask Angle10°
Altitude5.50 mReceiver Delay130.7 nsReceiver Temp.33 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -4.30 219.92 -4.11 x 10-13 -0.19




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 1.15 x 10-11
0 h, 20 min 140 1.26 x 10-11
0 h, 40 min 136 1.15 x 10-11
1 h, 20 min 128 1.11 x 10-11
2 h, 40 min 112 1.04 x 10-11
5 h, 20 min 80 4.93 x 10-12


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 3.99
0 h, 20 min 139 7.48
0 h, 40 min 133 13.33
1 h, 20 min 121 27.08
2 h, 40 min 97 52.06
5 h, 20 min 49 48.96


SIMT(INDC) - SIMT(ABBS)
(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
1 320 310 62.68 2.04 +1.31 x 10-13 +0.03 View
2 480 460 282.26 6.67 -4.54 x 10-12 -0.45 View
3 430 390 56.79 3.45 -7.88 x 10-13 -0.61 View
4 280 260 51.81 1.36 -2.89 x 10-12 -0.80 View
5 410 390 247.01 3.03 -1.08 x 10-11 -0.80 View
6 450 310 133.92 2.78 +5.26 x 10-12 +0.92 View
7 310 300 56.56 1.80 +4.31 x 10-14 +0.01 View
8 290 270 51.13 1.19 +2.27 x 10-12 +0.65 View
9 390 360 173.75 9.94 +2.67 x 10-12 +0.71 View
10 370 330 86.41 2.14 -4.49 x 10-14 -0.06 View
11 --- --- ---------- ------- -------------- ------ ----
12 420 350 202.09 9.63 -3.90 x 10-12 -0.88 View
13 290 290 239.56 3.00 -1.86 x 10-11 -0.93 View
14 330 330 159.66 2.23 +4.36 x 10-12 +0.60 View
15 380 380 240.19 4.62 -9.32 x 10-12 -0.70 View
16 330 320 58.84 8.00 -1.14 x 10-12 -0.36 View
17 380 250 154.08 9.20 +3.34 x 10-12 +0.58 View
18 330 320 158.32 3.09 +9.23 x 10-12 +0.94 View
19 370 300 171.33 8.31 +8.12 x 10-12 +0.83 View
20 410 320 279.81 9.13 -9.40 x 10-12 -0.82 View
21 280 240 55.01 1.40 +3.07 x 10-12 +0.83 View
22 470 340 54.78 4.54 -2.84 x 10-13 -0.20 View
23 340 320 124.41 1.85 +2.04 x 10-13 +0.08 View
24 320 280 140.49 2.54 +9.33 x 10-12 +0.93 View
25 380 230 87.27 4.32 +9.06 x 10-14 +0.10 View
26 390 380 86.42 2.25 -4.84 x 10-13 -0.67 View
27 310 300 51.52 1.54 -2.38 x 10-12 -0.74 View
28 --- --- ---------- ------- -------------- ------ ----
29 310 300 141.98 3.60 -1.16 x 10-12 -0.82 View
30 200 150 56.82 3.50 -3.52 x 10-12 -0.88 View
31 470 420 82.55 2.98 -2.86 x 10-13 -0.45 View
32 480 430 95.58 2.25 -2.89 x 10-13 -0.40 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.