Decoder Applet

This application has been developed for an easy interpretation of TIsat-1 CW beacon data received in the early days of its mission.

Usage is simple. Fill the field "Date and time" with the timestamp of your reception (it may be not so precise, but it should have a meaning to identify the satellite's pass), please respect the format "yyyy-mm-dd hh-mm-ss" even for spaces and zero paddings (e.g 2010-07-18 08:12:00) and notice that timestamp should be UTC and 0-24 formatted. Fill the field "Message" with the message you have decoded, it should be something like "HI HI HI TISAT " followed by another Morse character. Orbit number is not mandatory. When you finished push add and your packet will be added to the list below. Add any multiple packets you want even if they are the same, it doesn't matter. Once you have the list click on "Decode" button to decode the temperatures. In the stand-alone application you can save this list in a log file well formatted, in online version for security reasons is not possible.
If you want to send us automatically your packet, you can register to the forum and use the username to fill the "Username" field. Then simply by clicking on "Upload" your list will be sent to SUPSI SpaceLab. If you dont't want to register, you can send an e-mail with your decoded packet file to SUPSI SpaceLab.
Thank you for your support!




Download stand-alone application.

Decoding table for TIsat-1 beacon messages: 437.305MHz

During the early days of TIsat-1 mission, during the day the beacon continuously sends the message "HI HI HI TISAT" followed by a Morse character indicating the temperature of the transmitter. The beacon is turned off during eclipse to avoid stress of the batteries. This message is repeated each 15s and is encoded with 17 WPM. The radio used as beacon has been completely developped at SUPSI with the help of local HAMs. The encoding of the temperature is reported in the next table.

Morse Character
F
 B 
 K 
R
H
N
T
E
I
S
A
D
M
U
5
L
Temperature (Celsius)
-10
-5
0
+5
+10
+15
+20
+25
+30
+35
+40
+45
+50
+55
+60
+65
Please report the received values, quality of signal, time and location. A Web application to upload these information will soon be available.