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

Laboratory 1Instituto Nacional de Tecnologia Industrial, Buenos Aires, Argentina ID Number014End Date2021-09-13
Latitude 34° 34 min 35.819 s SCounter Delay -0.05 nsReference SourceSIMT(INTI)
Longitude 58° 30 min 56.613 s WREF Delay 5 nsMask Angle10°
Altitude43.59 mReceiver Delay124.6 nsReceiver Temp.29 °C
Laboratory 2Instituto Nacional de Metrologia (INM)ID Number012Baseline4536.913 km
Latitude 4° 38 min 34.643 s NCounter Delay 0.30 nsReference SourceSIMT(INM)
Longitude 74° 5 min 32.593 s WREF Delay 60.9 nsMask Angle10°
Altitude2611.11 mReceiver Delay128.2 nsReceiver Temp.27 °C

Hours in
Common-View		 Mean Time
Offset (ns)		 Range (ns) Frequency Offset Confidence (r)
24 -41.11 26.06 +5.77 x 10-14 +0.18




Allan Deviation
Averaging Period ()
(hours, minutes)		 Samples Frequency
Stability
0 h, 10 min 142 5.95 x 10-12
0 h, 20 min 140 3.79 x 10-12
0 h, 40 min 136 2.39 x 10-12
1 h, 20 min 128 1.77 x 10-12
2 h, 40 min 112 1.01 x 10-12
5 h, 20 min 80 4.57 x 10-13


Time Deviation
Averaging Period ()
(hours, minutes)		 Samples Time
Stability (ns)
0 h, 10 min 142 2.06
0 h, 20 min 139 2.02
0 h, 40 min 133 2.31
1 h, 20 min 121 3.68
2 h, 40 min 97 3.33
5 h, 20 min 49 5.21


SIMT(INTI) - SIMT(INM)
(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
1 310 150 20.53 1.40 -1.40 x 10-12 -0.89 View
2 350 160 10.43 0.75 +4.08 x 10-14 +0.13 View
3 330 330 21.86 1.69 +3.98 x 10-13 +0.41 View
4 360 140 29.44 1.75 +4.20 x 10-12 +0.95 View
5 390 110 22.81 2.27 -6.27 x 10-13 -0.88 View
6 330 80 20.80 2.34 -2.56 x 10-12 -0.78 View
7 360 180 38.55 1.59 +3.83 x 10-12 +0.98 View
8 350 200 29.41 3.79 -1.05 x 10-12 -0.47 View
9 350 250 34.45 1.86 +1.43 x 10-12 +0.89 View
10 320 190 28.18 1.03 -1.03 x 10-13 -0.54 View
11 --- --- ---------- ------- -------------- ------ ----
12 340 310 37.00 1.57 -1.08 x 10-12 -0.59 View
13 300 170 31.92 1.36 -2.17 x 10-12 -0.91 View
14 330 190 30.80 1.57 +2.68 x 10-12 +0.93 View
15 380 200 36.81 2.09 -2.12 x 10-12 -0.67 View
16 410 180 43.82 2.36 +3.82 x 10-13 +0.92 View
17 370 150 27.38 0.85 +6.73 x 10-13 +0.94 View
18 350 190 52.49 1.50 +4.10 x 10-12 +0.95 View
19 250 50 3.41 0.70 +8.20 x 10-13 +0.61 View
20 350 180 39.88 1.72 -3.68 x 10-12 -0.94 View
21 330 230 28.88 1.29 -1.74 x 10-12 -0.89 View
22 310 180 29.91 2.75 +7.13 x 10-13 +0.57 View
23 280 170 38.81 1.01 -1.96 x 10-13 -0.47 View
24 360 240 40.65 1.66 -3.41 x 10-12 -0.97 View
25 370 260 40.04 0.71 -1.91 x 10-12 -0.87 View
26 310 190 42.26 3.67 +2.95 x 10-13 +0.85 View
27 300 220 28.17 1.74 -1.74 x 10-12 -0.88 View
28 --- --- ---------- ------- -------------- ------ ----
29 370 160 7.80 0.86 +5.78 x 10-13 +0.60 View
30 360 210 39.66 1.09 +3.40 x 10-12 +0.99 View
31 380 140 28.11 2.36 -2.98 x 10-13 -0.57 View
32 380 170 31.25 1.75 +2.07 x 10-13 +0.38 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.