2018-11-26

Meteor Scatter QSO Example 4

The following is an example of a meteor scatter QSO between two stations QW1XYZ and OZ2M pursuing an MS QSO in compliance with the IARU MS procedure. For some reason QW1XYZ gets "out of sync," i.e. ahead of the MS procedure way of doing things. This might have happened due to many reasons, e.g. wrong decoding of the received information or QRM from another station.

UTC   Received   Transmitted   Q W 1 X Y Z   O Z 2 M   tx-d tx-s   rx-r? rx-d? rx-s?   Note
21:20:00   NIL      
21:20:30       QW1XYZ OZ2M                                         MSP 4.4.8.1
21:21:00   NIL      
21:21:30       QW1XYZ OZ2M                                          
21:22:00   NIL      
21:22:30       QW1XYZ OZ2M                                          
21:23:00   Z2M QW     Q W Z 2 M   Duration was 120 ms and Strength was 3 dB
21:23:30       QW1XYZ OZ2M 26 26                           2 6           MSP 4.4.8.2 and 4.4.8.3
21:24:00   NIL                
21:24:30       QW1XYZ OZ2M 26 26                                          
21:25:00   W1XYZ 27 2         1 X Y Z       2 7  
21:25:30       QW1XYZ OZ2M 26 26                                          
21:26:00   NIL                            
21:26:30       QW1XYZ OZ2M 26 26                                          
21:27:00   27 27

XYZ

Z 27 2

                           
21:27:30       QW1XYZ OZ2M 26 26                                          
21:28:00   NIL                            
21:28:30       QW1XYZ OZ2M 26 26                                          
21:29:00   XYZ RRRR                             OZ2M is still missing "O" but QW1XYZ transmits RRRs
21:29:30       MMMM MMMM OZ2M                                         Old MS procedure MSP 9. For some reason these clever messages have been removed.
21:30:00   NIL                            
21:30:30       MMMM MMMM OZ2M                                          
21:31:00   2M OZ2M OZ2M                 O             MSP 4.4.8.4 bullet 1
21:31:30       RRRR RRRR OZ2M                                         MSP 4.4.8.4 bullet 2
21:32:00   NIL                              
21:32:30       RRRR RRRR OZ2M                                          
21:33:00   QW1

YZ 73

73

                              Courtesy message to OZ2M indicating RRRs have been received. Even if this courtesy message is not received by OZ2M the QSO is complete MSP 4.4.8.5

 


Bo, OZ2M, www.rudius.net/oz2m