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Re: PMS usage suggestions?



So how quickly could you get on, get a list of the last 10 messages and
read a 3 line message in the absence of QRM?

Bob

On Sat, 2 Mar 2002, Scott Avery wrote:

> Hello Bob and all....
>
> Nice idea, but how do you get everyone to understand or conform?
> It is a hard task.
> It seems I have been here before on MIR with it's PMS.
> We have a lot on HAMS that never got to experience MIR operations.
> So, here is what I sent around back when MIR was up.
> ISS/RS0ISS packet operations are basically the same as what MIR was.
> There are differences in the TNC used, and some of the commands, but the
> basic principle are the same.
>
> Attached below is a user's guide I typed a long time ago, and was widely
> used on MIR, and helped in educating the users.
> Miles, WF1F also has something more updated on ISS operations.
>
> Please read, and try to understand, This is NOT an operations manual for
> ISS. Other than that... Basically the same animal....
>
> 73, Scott
> CU on ISS....
>
>
>
>
>                              HOW TO WORK R0MIR-1
>
> The MIR Space Station is currently orbiting the earth about every
> 95 minutes while traveling at roughly 17,000 MPH. Due to the fact
> that MIR is a moving object, and radio frequencies being involved
> here, Doppler corrections may be needed. On the 2 meter band, the
> Doppler is a maximum of 3.5 khz on a pass directly overhead (90 degrees).
> On a pass say 10 degrees above the horizon, the Doppler is small
> about 1 khz. This can be a very important factor in working the packet
> Personal Mail System. This is because packets may become distorted.
> Here are some items to look at in your station for successful attempts.
>
> 1. LOCATION
>
> If you are in a bad location where it might be difficult to get
> a signal out, you might be limited to the number of passes that
> you can work. You might want to look into a simple 1/4 wave 2 meter
> groundplane. This antenna has a good lobe looking up. (pre-amp suggested)
> If you are in the clear to your horizons, you have it made.
> However, Doppler and antenna type will be your disadvantage.
> For the average HAM station running say a 50 watt radio, and a J pole
> antenna has a great advantage on MIR passes that are up to about
> 20 degrees above the horizon! Doppler isn't a real consideration
> and your antenna pattern is ideal for something up to 20 degrees
> above the horizon, or a bit more! Most radios will work, and no
> frequency corrections are needed. Doppler up on UHF is around 10 KHZ
> and Doppler compensation is needed! A MUST for SAFEX or any UHF
> satellite operations.
> Note: SAFEX not operational at this writing.
>
>
> 2. TRACKING
>
> You will need some satellite tracking software to know when and where
> MIR will be in your area. There is a lot of tracking software available
> on the internet. I use STSPLUS, and have for over 15 years. Keplerian
> information on MIR and other satellites is updated twice weekly, and can
> be found on your local BBS or on at Amsat.org
>
> 3. FREQUENCY
>
> The frequency For ISS is 145.800rx PLUS 145.99tx (YOU) World Wide. (1200
> baud packet)
>
>
> 4. PACKET WISE
>
> If you are not familiar with packet connections or mailboxes, do some
> experimentation on the ground first before trying to operate MIR.
> The TNC on MIR is a Kantronics KPC-9612+ V 8.1 and is operating at
> 1200 baud ONLY. Here is the HELP that you would get on R0MIR-1 when
> using the Help (H) command.
>
> Note: ISS uses a Pacomm TNC, and the command list is a bit different!
>
>
> B(ye)         PBBS WILL DISCONNECT
> E(dit) n [BPTYNFH] [>tocall] [<fromcall] [@BBS] "old" "new"
> J(heard)      CALLSIGNS WITH DAYSTAMP
> J S(hort)     HEARD CALLSIGNS ONLY
> J L(ong)      CALLSIGNS WITH DAYSTAMP AND VIAS
> L [x [y]] [;] LIST MESSAGES x THRU y YOU CAN READ
> L <|> call    LIST MESSAGES FROM OR TO CALL
> LB            LIST BULLETINS
> LC [cat]      LIST CATEGORIES
> LL n          LIST LAST n MESSAGES
> LM(ine)       LIST UNREAD MESSAGES ADDRESSED TO YOU
> LO [+|-]      LISTING ORDER
> LT            LIST TRAFFIC
> LTn           DISPLAY LOCATION TEXT n=1-4
> K(ill) n      DELETE MESSAGE NUMBER n
> KM(ine)       DELETE ALL READ MESSAGES ADDRESSED TO YOU
> R(ead) n      DISPLAY MESSAGE NUMBER n
> RH n          DISPLAY MESSAGE n WITH HEADERS
> RM(ine)       READ ALL MESSAGES ADDRESSED TO YOU
> S(end) call   SEND MESSAGE TO callsign
> S[B|P|T] call SEND BULLETIN, PRIVATE, or TRAFFIC
>
> Please don't use the Help command on MIR. This is STANDARD to MOST
> TNC's and doing so just limits the use of MIR by other stations.
> There can only be ONE user connected to R0MIR-1 at a time.
>
> 5. BE PREPARED
>
> If you wish to send a message to the crew, have a file of message READY
> to go! What I usually do is make a message to R0MIR BEFORE I even send it.
> On my KPC-9612, I get in my mailbox, and SP R0MIR@MIR Then enter the
> subject and then the message. When MIR is in range, and the mailbox is
> not being used, I forward the message. My TNC talks to MIR's TNC and
> goes through the forwarding process. This is ALOT quicker! I send 3.7K
> of info in one minute! This includes the connect to disconnect time.
> Consult YOUR TNC users manual for forwarding mail to a station.
>
> Don't try to send a message to your buddy down the street to MIR's
> PERSONAL Mailbox. It will NOT allow 3rd party messages. If you try,
> you will get a response - MESSAGES MUST BE ADDRESSED TO THIS STATION.
>
> 6. BE COURTEOUS
>
> Please don't try connecting to R0MIR-1 when someone else is already
> connected. You will get a R0MIR-1 **BUSY. When you get this, don't
> keep trying while others are connected. This just messes up the other
> station, and it is interference and will just take that much LONGER
> for the user to finish before he/she disconnects. Would you like
> others interfering with your connects to MIR? Look for the D frame
> from R0MIR-1 to the connected station. Using MCOM ON will allow you
> to see all these packets. Here is what MY KPC-9612 would show.
>
> R0MIR-1>WA6LIE/1 [05/13/98 22:18:04]: <<D>>:
>
> After you see this, hopefully, the ground station has sent his/her
> disconnect to R0MIR-1, and it will be ready for the next connect.
> -----------------
>
> R0MIR
> This is the callsign of MIR. This port has no value to working MIR
> except credit towards a QSL card. There is nobody at the keyboard.
> -----------------
>
> QSL REQUESTS USA and WW except Europe:
>
> Dr. Dave Larsen - N6CO/K6MIR
> POB 1501
> Pine Grove, California
> 95665
> USA
>
> Please include a SASE (Business Size Envelope) and one IRC > for
> international. If you are sending an IRC, Please make sure it is dated
> 1998, as the post office won't accept IRC's dated over 1 year old.
> "Green Stamps" are appreciated for covering additional costs.
> ------------------------------------
>
> If you have any questions, drop me a note!
>
> 73, Scott
>
> E-Mail: wa6lie@msn.com
> Packet: wa6lie@wa6lie.#wcca.ca.usa.noam
>
>
>
>
> >From: Bob Bruninga <bruninga@usna.edu>
> >To: sarex@AMSAT.Org, <amsat-bb@AMSAT.Org>
> >Subject: [sarex] PMS usage suggestions?
> >Date: Sat, 2 Mar 2002 10:19:34 -0500 (EST)
> >
> >There will of course be no universal agreement of the best way to use the
> >PMS on orbit, but we do need to look at some strategies that might help
> >in defining expectations for maximum utility of the asset.
> >
> >Here is just one such possibility to consider over populated continents:
> >
> >(*) A user is limited to one minute.
> >
> >    This means, the clock starts when you send your first connect request,
> >    and  the buzzer goes off when 1 minute is up.  At that point, you must
> >    issue a disconnect.
> >
> >The logic behind this recommendation is as follows.
> >
> >1) It would allow as  many as say a dozen or more successful users per
> >    pass over the USA and or europe (if they do it right)
> >2) It would encourage users to know in advance how to work it
> >3) It would encourage people to prepare their uplinks OFF LINE.
> >4) It would encourage people to get the message list by monitoring someone
> >    elses downlink rather than wasting their precious minute with a
> >    duplicate download of the same user list.
> >5) Awards could be given for the shortest access times. (You can get a
> >    list in under 15 seconds Connect-to-disconect)
> >6) It would encourage stations to use the proper station for SUCCESS.
> >    (constant retries means your station is not up to the task)
> >7) Each person's access is an EQUAL measureable quantity.  We no longer
> >    have to make subjective judgements about "other peoples" use of the
> >    system.
> >8) The order of magnitude higher "success" rate would reward everyone
> >    monitoring with being able to capture the essence of the PMS traffic
> >    without even connecting.
> >9) We would have a working PMS that shows the world what Amateur radio can
> >    do.
> >
> >The status-quo alternative of having it turned off, and or quibbling
> >forever about who should and who should not be using it doesnt do anyone
> >any good...
> >
> >just an idea...
> >
> >de WB4APR, Bob
> >
> >----
> >Via the sarex mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> >To unsubscribe, send "unsubscribe sarex" to Majordomo@amsat.org
>
>
>
>
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.
>

de WB4APR@amsat.org, Bob

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