oig-molc proposal

Sun, 21 Jun 98 04:30:10

Hello All,

		Follow-up discussions, questions, and
		inquires on this posting SHOULD be made on 
		UseSat-L and NOT SeeSat-L. See *below* on how
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It's not clear to me what resources will be out there on the NET on/after 
June 30 to provide grouped elsets pertaining to Low Earth Orbit 
satellites that have the potential for observation.

As most of you know, OIG's telnet site will be shutdown on that date. 
Efforts are being made by some to have access to some or all
of the elements presently not available by OIG's web site so things as 
they exist now, can go on. This requires the approval of the bureaucracy 
associated with NASA. I think there should be a back-up plan to those 
efforts to help ensure a limited resource remains to at least provide the 
elements found in the useful molczan elset file for potentially visible 
Low Earth Orbit satellites.

I would like to propose to the subscribers of SeeSat-L the formation of a 
network of volunteers to gather, compile and make available to any Net 
resource (FTP and/or web site), a list of LEO satellite elements, updated
on a weekly basis. The elements included would be those presently found 
in the molczan files.

The compiled data would have the "line zero" common name information, 
but not the "n21 description" information (magnitude, dimensions, 
etc.) which is provided by Mike McCants in his molczan elsets. 
Of course, it would only include the unclassified elements 
provided by OIG. I am not trying to replace the service provided by Mike. 
I am trying to provide a redundant resource from the OIG web site for 
similar, but not identical data.

I envision the need to have a significant number of volunteers who would 
obtain a preset group or block of elements (say, 50 elements per block) 
from OIG's "100 elements per 24 hours limit"  request service. Those 
elements would be forwarded to a "compiler". The compiler would then send 
the grouped elsets as one elset file (an example: leovis.tle) to various 
Net resources wanting the info. The end user would in turn access the 
elset from those Net resources.

The concept of retrievers/compilers would have to be duplicated to have
adequate redundancy to ensure a reliable resource. I envision the need 
to have around 60 or so volunteers, mostly retrievers, and two or more 
compilers. This number is based on there being approximately 1500 
elements in the existing molczan file. Using a block value of 50 elements 
obtained MANUALLY from OIG'S web site would mean a minimum of 30 
retrievers or 60 for redundancy.

I would recommend those not familiar with OIG's web site to visit it to 
become more familiar with their services. You must register to be able to 
download more than 20 and up to 100 elements in a 24 hour period. Keep in 
mind, OIG reserves the right to restrict access as they see fit.


The domain name by itself will also work.

I would be willing to act as coordinator and as one of the compilers, 
but as I said, I think more than one compiler and duplicate retrievers 
would be necessary to ensure a reliable resource.

I'm putting this proposal out there for further discussion on 
UseSat-L, *NOT* SeeSat-L. 

These discussions would only be appropriate on UseSat-L. 
SeeSat-L is reserved for observation information. 

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I can be easily persuaded to drop this proposal if someone can tell 
me that there will be at least two independent resources out 
there before June 30 that can obtain elements from OIG (by what ever 
method;-) to ensure an element resource that is at least 
comprised of the unclassified elements found in the molzcan file.  
Ideally, a resource having all the unclassified elements would be best, 
but my proposal is an intermim measure to provide an adequate number of 
potentially visible satellites available to the general user. 
It is not the best solution, but a viable (let's hope) interim solution.

My proposal is not necessarily endorsed by the founders of SeeSat-L.

Those wishing to be volunteers may e-mail me directly or use UseSat-L. 
Discussions should be directed to  UseSat-L. 

Please do *not* continue discussions for this specific proposal on 
SeeSat-L. Others may wish to propose alternate solutions. I would suggest 
that they do that either on SeeSat-L or UseSat-L by using a different 
subject header to identify the topic. I prefer that the subject header 
related to my proposal begin with "oig-molc proposal". Again, my proposal 
is to obtain the unclassified elements found in the molczan file from the 
existing OIG web site. 

Remember, if the volunteer resource is not there, this is all academic.


Jeff (we shall overcome;-) Hunt <jeff@satellite.eu.org>