Countering Doppler Shift during AO-51 satellite pass

Further to the previous post on VO-52, this post the method for countering  the doppler shift for Satellite AO-51 (ECHO) is described below.

I have made many successful DX contacts on this satellite in last 8 weeks using this methodology as explained by OM VU2GUR. 
 

The success of bird tacking depends on how effectively you tackle the doppler shift while satellite is approaching you and while it is moving away from you.

Below given is the table which explains you can tackle the doppler shift for AO-51 (ECHO)

                                                    Uplink(Mhz)         Downlink(Mhz)

 

When Sat is approaching you-----    145.915             435.310
                                                                                435.305

When Sat is near you --------------  145.920              435.300

When Sat is goes away from you-   145.925              435.295
                                                                                435.290

As you get used to these shifting during the advanced stages you can shift both uplink and downlink simultaneously.


Happy Bird Tracking


73s
VU2TQC

+91 9821159097