確かに、周波数は 437.457MHz で最も受信しやすくなっています。
ビーコン間隔も、初期の 5秒毎から 6秒毎に変化しています。

KE7EGC>UNDEF,TELEM [05/30/09  16:39:46] <UI C>:
PharmaSat.org 60C643300043021FB202C2020200EE07A70A2867321E4B4562
KE7EGC>UNDEF,TELEM [05/30/09  16:40:03] <UI C>:
PharmaSat.org 60C64338004702015CC1A4010600EE07AB0A11843FAC474959
KE7EGC>UNDEF,TELEM [05/30/09  16:40:09] <UI C>:
PharmaSat.org 60C643250048020100A1A4010600EE07AB0A1D000000000000
KE7EGC>UNDEF,TELEM [05/30/09  16:40:15] <UI C>:
PharmaSat.org 60C643100048020100A1A4010700EE07690A2953350349A443
KE7EGC>UNDEF,TELEM [05/30/09  16:40:21] <UI C>:
PharmaSat.org 60C643060048020100A1A4010900EE07690A35592F61552964
KE7EGC>UNDEF,TELEM [05/30/09  16:40:26] <UI C>:
PharmaSat.org 60C643090040027E6300A6011F07EE07690A06BB320F43DD68
KE7EGC>UNDEF,TELEM [05/30/09  16:41:07] <UI C>:
PharmaSat.org A6C64358004A0201674BA4010600EE07AB0A011C269723CE56
KE7EGC>UNDEF,TELEM [05/30/09  16:41:31] <UI C>:
PharmaSat.org D9C64356004B027E0000A6011F07EF07770A2A4A315847E95B
KE7EGC>UNDEF,TELEM [05/30/09  16:41:37] <UI C>:
PharmaSat.org D9C6433B0048027E0000A6011F07EF07770A36CD3720504562
KE7EGC>UNDEF,TELEM [05/30/09  16:41:43] <UI C>:
PharmaSat.org ECC6438600E70209760033020000EF07770A074017A625844E