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

Re: AO-40 just before LOS at Jan 27



Jens,

Upon first seeing these numbers I thought the same as you.  However, upon
looking more closely I find that they are real.  AO-40 is always (except for
the last point listed) approaching the receiver.  That's why they are all
doppler shifted higher than the transmit frequency of 2401.323 MHz.  However,
the *rate* of approach is slowing down.  Therefore the amount that the received
frequency is shifted becomes less.  The very last point shows AO-40 moving away
from the receiver.  Be careful with the Range number it is rounded off to the
nearest 100.

73's de Rich @ WC8J

----

"Jens H. Jensen" wrote:

> At 17:01 27-01-2001 +0900, you wrote:
>
> >   AO-40    JST     UTC     MHz(USB)    MA    El/Azm    Range
> >          12:47   03:47    2401.343    249    27/141    8700
> >          12:48   03:48    2401.342    250    26/139    8500
> >          12:49   03:49    2401.340    250    24/137    8300
> >          12:50   03:50    2401.339    250    22/136    8200
> >          12:51   03:51    2401.338    250    20/135    8000
> >          12:52   03:52    2401.336    250    17/132    7900
> >          12:53   03:53    2401.334    251    15/130    7800
> >          12:54   03:54    2401.332    251    12/128    7700
> >          12:55   03:55    2401.329    251    10/127    7600
> >          12:56   03:56    2401.326    251     7/125    7500
> >          12:57   03:57    2401.324    252     4/123    7450
> >          12:58   03:58    2401.322    252     1/121    7400 ... LOS
>
> Ehhhh, strange figures?....
>
> The Range is decreasing, indicating that the sat moves towards you, but the
> beacon freq is also decreasing. Isn't that the opposite that you would
> expect from doppler?
>
> 73 de OZ1LRG
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

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



AMSAT Top AMSAT Home