[amsat-bb] BY70-1 decay estimate

[Joe]

Morning Nico,

Sad,

Just curious tho, How do you know with such certainty it happened here?

The status board had it being heard last in Europe, and then going to 
less populated areas.

Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 2/18/2017 5:39 AM, Nico Janssen wrote:
> All,
>
> BY70-1 re-entered today 2017-02-18 at 00:19 UTC +/- 3 minutes near
> 11 degrees South, 159 degrees West.
>
> 73,
> Nico PA0DLO
>
>
> On 17-02-17 16:39, Nico Janssen wrote:
>> All,
>>
>> BY70-1 may be expected to re-enter on February 18 around 01:05 UTC
>> ± 1 hour.
>>
>> If you wish to track the satellite all the way to the re-entry, I 
>> suggest you
>> use the following TLE sets:
>>
>> After 2017-02-17, 19:00 UTC use this TLE set:
>> BY70-1                                           180 x 153 km
>> 1 41909U 16083C   17048.79504626  .12181346  12893+0  71409-3 0 99991
>> 2 41909  97.5409 131.9041 0020298 184.6552 175.3259 16.39700464 8178
>>
>> After 2017-02-17, 20:30 UTC use this TLE set:
>> BY70-1                                           174 x 150 km
>> 1 41909U 16083C   17048.85604685  .15184949  20755+0  66732-3 0 99998
>> 2 41909  97.5404 131.9770 0018254 184.4013 175.5826 16.41354756 8186
>>
>> After 2017-02-17, 22:00 UTC use this TLE set:
>> BY70-1                                           167 x 146 km
>> 1 41909U 16083C   17048.91697788  .20752091  42136+0  63726-3 0 99993
>> 2 41909  97.5397 132.0500 0015727 184.1470 175.8399 16.43503239 8199
>>
>> After 2017-02-17, 23:30 UTC use this TLE set:
>> BY70-1                                           156 x 140 km
>> 1 41909U 16083C   17048.97781267  .34949706  12852+1  64507-3 0 99992
>> 2 41909  97.5387 132.1232 0012260 183.8922 176.0983 16.46726667 8207
>>
>> 73,
>> Nico PA0DLO
>>
>>
>> On 16-02-17 21:19, Nico Janssen wrote:
>>> All,
>>>
>>> BY70-1 may be expected to re-enter on February 18 around 01:00 UTC
>>> +/- 3 hours.
>>>
>>> The apogee of the satellite has now decreased to 242 km and the perigee
>>> has decreased to 176 km.
>>>
>>> 73,
>>> Nico PA0DLO
>>>
>>>
>>> On 12-02-17 13:27, Nico Janssen wrote:
>>>> All,
>>>>
>>>> As a result of lower solar activity in the past week, the decay 
>>>> rate of
>>>> BY70-1 has decreased. The satellite may now be expected to re-enter
>>>> around February 16 to 19.
>>>>
>>>> The apogee of the satellite has now decreased to 313 km and the 
>>>> perigee
>>>> has decreased to 191 km.
>>>>
>>>> 73,
>>>> Nico PA0DLO
>>>>
>>
>
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