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

Laboratory 1IBMETRO Bolivia ID Number025End Date2021-09-14
Latitude 16° 30 min 1.070 s SCounter Delay -0.08 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
Laboratory 2Observatorio NacionalID Number010Baseline2682.287 km
Latitude 22° 53 min 44.563 s SCounter Delay 0.09 nsReference SourceSIMT(ONRJ)
Longitude 43° 13 min 27.407 s WREF Delay 54.2 nsMask Angle10°
Altitude35.82 mReceiver Delay146.7 nsReceiver Temp.28 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -93.40 19.06 +7.24 x 10-14 +0.34




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 3.78 x 10-12
0 h, 20 min 140 2.61 x 10-12
0 h, 40 min 136 1.73 x 10-12
1 h, 20 min 128 1.13 x 10-12
2 h, 40 min 112 7.28 x 10-13
5 h, 20 min 80 3.62 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 1.31
0 h, 20 min 139 1.37
0 h, 40 min 133 1.77
1 h, 20 min 121 2.23
2 h, 40 min 97 3.12
5 h, 20 min 49 2.41


SIMT(IBM) - SIMT(ONRJ)
(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
1 340 300 18.03 1.09 -3.72 x 10-13 -0.50 View
2 290 150 15.26 3.01 -1.52 x 10-13 -0.16 View
3 310 200 14.09 1.85 -1.04 x 10-12 -0.90 View
4 300 260 37.98 4.49 -1.76 x 10-12 -0.92 View
5 290 160 21.55 2.97 -2.74 x 10-13 -0.68 View
6 270 140 27.85 2.68 -6.31 x 10-13 -0.96 View
7 340 310 21.78 1.96 -1.02 x 10-12 -0.86 View
8 320 260 18.22 1.96 -5.55 x 10-13 -0.53 View
9 330 300 23.64 3.32 -8.07 x 10-13 -0.66 View
10 300 290 37.29 2.67 +1.50 x 10-13 +0.66 View
11 --- --- ---------- ------- -------------- ------ ----
12 310 230 10.37 1.35 -3.87 x 10-13 -0.55 View
13 330 310 40.40 2.59 -7.73 x 10-13 -0.47 View
14 320 290 23.92 1.45 -2.73 x 10-13 -0.21 View
15 310 250 41.25 2.25 -1.31 x 10-12 -0.57 View
16 290 200 17.27 2.01 +6.27 x 10-14 +0.56 View
17 190 130 12.67 3.52 +7.93 x 10-15 +0.01 View
18 360 340 42.20 2.75 +2.84 x 10-13 +0.60 View
19 210 190 23.97 1.11 -4.00 x 10-13 -0.31 View
20 260 180 23.76 2.13 +9.57 x 10-13 +0.54 View
21 340 260 15.05 1.66 -5.91 x 10-13 -0.74 View
22 110 70 14.83 2.79 -1.14 x 10-12 -0.83 View
23 300 280 18.84 2.81 +1.40 x 10-13 +0.87 View
24 280 200 10.48 1.10 -1.74 x 10-13 -0.31 View
25 380 300 20.89 1.82 +6.99 x 10-13 +0.69 View
26 330 260 28.44 2.25 +1.34 x 10-13 +0.82 View
27 320 210 13.03 1.38 -3.00 x 10-13 -0.35 View
28 --- --- ---------- ------- -------------- ------ ----
29 340 250 19.81 1.27 +4.35 x 10-13 +0.45 View
30 310 110 18.05 1.34 -7.37 x 10-13 -0.80 View
31 220 130 43.71 4.47 +5.80 x 10-13 +0.97 View
32 320 250 22.67 2.40 +1.13 x 10-13 +0.47 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.