[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: 145.900 is not just used by pacsats!

    Personally I do not feel good about beaconing blindly knowing about
    these other satellites. With a omni directional uplink you do run a
    chance of getting into the FO birds.

    73, Randy N7SFI

Agreed!  I think the key word here is "blindly".  If an APRS user knows
a target satellite is overhead or reasoanbly close to being above the
horizon (say, within a few minutes), then well-managed beaconing on a
PACSAT uplink seems reasonable.  I have no problem with APRS operations
on under-utilized satellites or those facing obsolescence or dysfunction,
so long as this is consistent with the intentions of the control operators.
For example, if KO-23 can no longer support BBS operation but can still
act as a digipeater, then it might be a good candidate for UI operations.

The 2 meter satellite sub-band is a busy place.  I don't know if they're
all alive, but i count eight satellite at/near 145.900 MHz and it is even
possible that more than one might be overhead at the same time.  Operation
on an 2 meter uplink frequency when a suitable satellite not nearby is
causing interference to other satellites [97.101(b) and 97.101(d)] and
such operations may be also contrary to good amateur practice [97.101(a)].

Interference from stations who can't hear the satellite are our biggest
problem on AO-27 (even beyond over-use), and those who do get e-mail, 
cards, and/or phone calls when they cause problems.  (BTW, these are 
usually help people operate successfully.)  We don't need more problems 
in that sub-band.

Randy is not only very active on the satellites and especially helpful
to newcomers, but is working on getting one up and functioning.  I feel
we need to take his concerns very seriously.

                           -- KD6PAG

Attachment:  Current 2 meter uplink frequencies (from my personal 'modes.dat')

           Downlink         Satellite          Uplink

      437.1258        USB  LO-19        145.840           FM

      435.175         FM   KO-23        145.850           FM

      435.910         USB  FO-20        145.850           FM

      435.910         USB  FO-29        145.850           FM

      436.792         FM   AO-27        145.850           FM

      29.357-29.397   USB  RS-15        145.857-145.897   USB

      437.1258        USB  LO-19        145.860           FM

      435.910         USB  FO-20        145.870           FM

      435.910         USB  FO-29        145.870           FM

      436.500         FM   KO-25        145.870           FM

      435.822         USB  IO-26        145.875           FM

      437.1258        USB  LO-19        145.880           FM

      435.910         USB  FO-20        145.890           FM

      435.910         USB  FO-29        145.890           FM

      435.120         FM   UO-22        145.900           FM

      435.175         FM   KO-23        145.900           FM

      435.8-435.9     USB  FO-20        145.9-146         LSB

      435.8-435.9     USB  FO-29        145.9-146         LSB

      435.822         USB  IO-26        145.900           FM

      437.0513        USB  AO-16        145.900           FM

      437.1258        USB  LO-19        145.900           FM

      435.910         USB  FO-20        145.910           FM

      435.910         USB  FO-29        145.910           FM

      437.0513        USB  AO-16        145.920           FM

      435.822         USB  IO-26        145.925           FM

      437.0513        USB  AO-16        145.940           FM

      435.822         USB  IO-26        145.950           FM

      437.0513        USB  AO-16        145.960           FM

      435.120         FM   UO-22        145.975           FM

      435.2777        FM   POSAT        145.975           FM

      145.985         FM   MIR          145.985           FM

Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org