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

Laboratory 1Centro Nacional de Metrologia de GuatemalaID Number015End Date2021-09-13
Latitude 14° 35 min 24.774 s NCounter Delay -0.14 nsReference SourceSIMT(LNM)
Longitude 90° 32 min 31.394 s WREF Delay 0 nsMask Angle10°
Altitude1509.00 mReceiver Delay168.3 nsReceiver Temp.27 °C
Laboratory 2Observatorio NacionalID Number010Baseline6322.757 km
Latitude 22° 53 min 44.563 s SCounter Delay 0.07 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 20.55 25.38 -1.23 x 10-13 -0.44




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 141 8.13 x 10-12
0 h, 20 min 139 4.71 x 10-12
0 h, 40 min 135 2.48 x 10-12
1 h, 20 min 127 1.69 x 10-12
2 h, 40 min 111 1.17 x 10-12
5 h, 20 min 79 5.70 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 141 2.82
0 h, 20 min 138 2.52
0 h, 40 min 132 2.27
1 h, 20 min 120 3.22
2 h, 40 min 96 5.04
5 h, 20 min 48 4.68


SIMT(LNM) - 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
1 350 230 9.79 1.92 +1.40 x 10-13 +0.22 View
2 360 30 4.45 0.00 +3.16 x 10-12 +0.79 View
3 210 40 20.15 0.00 -7.37 x 10-13 -0.92 View
4 270 140 10.03 1.13 -8.78 x 10-13 -0.69 View
5 310 80 11.11 2.79 +3.63 x 10-13 +0.13 View
6 320 80 4.74 1.57 -4.85 x 10-15 -0.01 View
7 260 170 21.08 1.69 -1.68 x 10-12 -0.93 View
8 270 190 10.16 2.02 +2.46 x 10-13 +0.31 View
9 240 90 10.63 2.18 -4.34 x 10-14 -0.02 View
10 410 180 10.20 1.75 +2.94 x 10-14 +0.36 View
11 --- --- ---------- ------- -------------- ------ ----
12 190 20 6.10 0.00 -1.02 x 10-11 -1.00 View
13 260 140 18.99 2.06 -9.34 x 10-13 -0.68 View
14 440 190 18.58 1.79 -1.43 x 10-12 -0.85 View
15 310 200 28.46 1.83 -1.10 x 10-12 -0.60 View
16 320 170 10.13 1.42 +2.06 x 10-14 +0.17 View
17 360 60 8.16 1.60 -2.25 x 10-12 -0.85 View
18 300 190 21.86 2.64 +1.98 x 10-13 +0.13 View
19 190 40 14.48 0.00 -2.02 x 10-12 -0.93 View
20 220 110 10.00 3.25 +1.66 x 10-14 +0.01 View
21 240 70 6.16 1.87 +9.68 x 10-13 +0.83 View
22 250 60 19.61 10.19 -3.27 x 10-13 -0.05 View
23 400 150 16.41 1.41 -1.00 x 10-12 -0.70 View
24 320 190 21.18 1.45 +1.52 x 10-12 +0.85 View
25 270 90 16.62 0.66 -1.57 x 10-12 -0.90 View
26 290 180 17.32 2.13 +8.25 x 10-15 +0.08 View
27 290 190 13.57 2.36 +2.10 x 10-13 +0.19 View
28 --- --- ---------- ------- -------------- ------ ----
29 260 110 19.42 2.71 +2.46 x 10-12 +0.83 View
30 280 100 15.64 1.14 -1.89 x 10-12 -0.98 View
31 310 30 3.00 0.00 -2.50 x 10-12 -1.00 View
32 350 70 6.92 0.94 +4.17 x 10-13 +0.36 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.