Stargate did not use anything called "bags".  I just checked the source 
code to confirm.

It also didn't use D news.  Stargate required B news.

Remember - Stargate was in the 1987 time frame.  Googling for Dnews 
turns up a CNet page saying it was released in 2004.

     Mary Ann


On 05/09/2018 10:03 PM, Bakul Shah wrote:
> On Wed, 09 May 2018 22:53:01 -0600 Grant Taylor via TUHS <tuhs at minnie.tuhs.org> wrote:
>> On 05/09/2018 09:51 PM, Lyndon Nerenberg wrote:
>>> What are they to begin with?  Having run some "major" UUCP hubs in the
>>> day, I have no clue what a UUCP "bag" is ...
>> I see them in the context of Usenet via UUCP, so rnews.
>>
>> The best that I can tell is that they are simply the messages that need
>> to be sent written into a single file that is then transferred via some
>> mechanism, ftp being a common one.
>>
>> It looks like it might be the output of nntpsend or send-nntp.  Or
>> perhaps output of downstream / related UUCP commands.
>>
>> I often see it mentioned in close proximity of DNews.
>  From dnews manual
>
> Sucking in UUCP or Satellite articles
>
>    DNEWS can read UUCP bag files in standard rnews format,
>    these are often used by satellite systems, the satellite
>    receiver software may write 'uucp' files to a directory on
>    your system, dnews can then automatically scan and read in
>    items that appear in this directory. To read these files
>    just specify in dnews.conf the directory and file names that
>    DNews should scan, e.g. in dnews.conf
>
> I have a vague memory of some folks (Mark Horton?) sending usenet
> data in the unused portion satellite TV signal (stargate?).
>
> Ah, this must be it!:
>
> https://web.archive.org/web/19981203103811/http://www.stargate.com/history.html