Measured Data

You can obtain SOFIE-Data by following this link:



Data

Data Labeling

Every receiver obtain an ID for naming the data files. For example the DLR_School_Lab in Neustrelitz has the ID "NZ1". By this (and a look-up-table) you get the information about the location of every single receiver. We use the ID as the ending of the file. Furthermore you can find the information about the date of receiving in the name. For this we follow the pattern of:
yyyymmdd (y-year, m-month, d-day).
For example a data file can have the name:"20100101.NZ1". So we know it was received on the 1st of January 2010 in the DLR_School_Lab Neustrelitz.

Content of the Data

UTC: 1 1
2209 00:00:15
2209 00:00:20
2262 00:00:25
2258 00:00:29

A SOFIE-datafile looks like this. In the first line you find some information regarding UTC, Greenwich. In this example the first "1" tells you, that the receiver is located eastern from Greenwich (true). If not, you would see a "0" (false). The second "1" tells you the time difference between receiver and Greenwich. Daylight savings time isn't considered.

Following the file head, you see the measurements of the signal strength (in millivolts) and the corresponding timestamp (hour: 0-23).


Information to the Transmitters

Frequency Transmitter Location ID Coordinates
22,1 kHz Skelton Great Britain GQD 54.731806N
2.883028W
23,4 kHz Rauderfehn Germany DHO38 53.080611N
7.614083O
24,0 kHz Cutler USA (Maine) NAA 44.643414N
67.281861W
45,9 kHz Sigonella Italien NSY 37.405192N
14.921545O
37,5 kHz Grindavik Island NRK 63.850375N
22.465935W

Information to the Active Receivers



Calculation of the Distance and Bearing

Receiver Tranceiver Distance/Bearing
Latitude : [-]deg.ddddd

Longitude : [-]deg.ddddd

Latitude : [-]deg.ddddd

Longitude : [-]deg.ddddd

Distance [in km]:
000
Bearing [in °]:
000



Coordinates format is the pair of latitude and longitude, with sign minus (-) for the direction south latitude and west longitude, here some example:
52.5163 , 13.3779
40.7682 , -73.9816
-22.9708 , -43.1830

Calculation of the sunrise and sunset

Latitude : [-]deg.ddddd

Longitude : [-]deg.ddddd

Date:



sunrise:
0
sunset:
0