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

Laboratory 1Institute Nacional de Normalizacion (INN)ID Number022End Date2021-09-13
Latitude 36° 49 min 49.950 s SCounter Delay 0.03 nsReference SourceSIMT(INN)
Longitude 73° 2 min 13.605 s WREF Delay 0 nsMask Angle10°
Altitude56.56 mReceiver Delay6.1 nsReceiver Temp.35 °C
Laboratory 2IBMETRO Bolivia ID Number025Baseline2292.089 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 18022.89 15874.85 +1.14 x 10-11 +0.09




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 1.54 x 10-9
0 h, 20 min 140 1.80 x 10-9
0 h, 40 min 136 1.69 x 10-9
1 h, 20 min 128 1.14 x 10-9
2 h, 40 min 112 7.82 x 10-10
5 h, 20 min 80 3.18 x 10-10


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 534.12
0 h, 20 min 139 1079.98
0 h, 40 min 133 1917.49
1 h, 20 min 121 2471.98
2 h, 40 min 97 3227.20
5 h, 20 min 49 2909.40


SIMT(INN) - 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
1 310 270 4458.37 185.34 -1.09 x 10-11 -0.04 View
2 220 120 17864.62 399.34 +1.01 x 10-10 +0.32 View
3 220 190 4459.31 304.62 -4.38 x 10-11 -0.17 View
4 230 190 4451.95 187.27 +9.14 x 10-11 +0.22 View
5 240 200 11054.28 194.26 +4.73 x 10-10 +0.58 View
6 240 180 19472.26 1587.67 -1.72 x 10-9 -0.82 View
7 230 230 18845.47 1362.13 -1.31 x 10-9 -0.78 View
8 270 250 4449.40 197.37 -2.64 x 10-11 -0.09 View
9 280 260 19464.66 1333.67 -8.40 x 10-10 -0.70 View
10 200 200 4502.16 241.72 -1.82 x 10-12 -0.05 View
11 --- --- ---------- ------- -------------- ------ ----
12 280 260 4638.93 219.07 -3.18 x 10-11 -0.10 View
13 320 280 6259.15 205.34 -1.55 x 10-10 -0.49 View
14 160 160 17330.24 206.04 +1.32 x 10-9 +0.83 View
15 290 240 4507.00 203.58 -5.34 x 10-11 -0.18 View
16 250 220 4476.85 234.44 +1.35 x 10-13 0.00 View
17 230 90 2471.63 65.86 +1.88 x 10-12 +0.04 View
18 240 240 4447.99 192.16 +8.88 x 10-11 +0.27 View
19 170 90 3655.35 290.28 +2.81 x 10-11 +0.23 View
20 180 130 12628.68 254.94 +9.86 x 10-10 +0.74 View
21 310 290 4472.83 203.91 +1.18 x 10-11 +0.04 View
22 190 60 3843.38 2.76 -1.35 x 10-10 -0.60 View
23 170 170 4457.61 240.20 +1.90 x 10-11 +0.34 View
24 280 250 4449.27 237.94 -1.41 x 10-11 -0.05 View
25 330 300 4466.91 237.93 -1.73 x 10-11 -0.07 View
26 280 250 4482.16 271.16 +5.06 x 10-12 +0.14 View
27 320 270 4459.85 253.35 -1.10 x 10-11 -0.17 View
28 --- --- ---------- ------- -------------- ------ ----
29 260 260 4475.64 245.42 +5.23 x 10-11 +0.20 View
30 240 170 20127.21 1458.94 +4.47 x 10-10 +0.36 View
31 190 130 4472.17 227.18 -3.51 x 10-10 -0.58 View
32 260 140 3867.57 268.20 +4.88 x 10-12 +0.09 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.