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Re: Huygens setup

From: <brett.reid_at_email.protected>
Date: Fri, 12 Nov 2004 23:36:43 +1100

 ('binary' encoding is not supported, stored as-is)
Hi All,
Thanks Max for clearing up the discrepancy between gg057b ver 2 and ver 3
frequencies. It was causing me some grief this afternoon.
We will check the Hobart gg057b setup in detail over the weekend and then
leave it in order to continue with the Australian LBA experiments and
IVS-T2035 - which we will finish early in order to record all of the
gg057a schedule.

Hobart will record 1465 gigabytes over 242 scans between 322/1445 and
322/2230 UT, a total of 7.75 hours. I do not see a gap which Chris spoke
of but this OK as the data will fit on the 1.6 TB mark5 module sent to
Hobart by JIVE.

Instead of the version 2 frequencies, we will be careful to use these
frequencies:
  RCP \_/\_/ \_/\_/ \_/\_/
  LCP \_/\_/
                             |
  2023.99-2039.99 LSB RCP \=> Cassini, MEX spacecraft
  2039.99-2055.99 USB RCP in this band

  2123.99-2139.99 LSB RCP
  2139.99-2155.99 USB RCP

  2270.99-2286.99 LSB RCP&LCP
  2286.99-2302.99 USB RCP&LCP

Chris, I hope this clears up any mysteries regarding Hobart.

Regards,
Brett.

Chris wrote:
>Hi all,
>
>(Max, Sergei - please read carefully!)
>
>I will send more detail on Monday or Tuesday, but I thought I would send a
>summary of what is happening, incase any setup is needed beforehand.
>
>LBA participates is in the time range:
>
>14:45:00-22:30:00 UT (Wed 17 Nov)
>
>Only the ATCA records for the entire time.
>
>
>DAS profiles. To match the VLBA recording, a special DAS profile is
>needed. This is basically a copy of the vsop.pro profile (or equivalent)
>but two changes are needed:
>- change bit encoding from VLBA to AT (sign/mag)
>- The "LSB" output needs to be flipped to look like a real
>LSB.
>
>Parkes, Mopra and the ATCA should be OK. Ceduna better email me if they
>have questions, but I don't know how to drive the DOS-in-a-box DAS control
>program.
>
>Specific Antenna notes:
>
>ATCA:
>
>Will only record a using a single DAS for the entire run.
>UT 14:45:00-22:30:00
>The caobs frequency should be set to 2287 MHz.
>
>Mopra:
>Will record for two periods:
>UT 14:45:00-19:30:00
>UT 20:50:00-22:30:00
>Recording will have to be stopped (by hand) during the off period
>Record all frequencies.
>
>Parkes:
>Due to elevation limitation starts late. Do not start recording until
>the beginning of the Parkes schedule. Observes also in two periods.
>UT 15:45:00-19:30:00
>UT 20:20:00-22:30:00
>
>Ceduna:
>Only records the dual pol signal. The centre of the DAS input frequency
>should be 2286.99 MHz.
>Records for two periods:
>UT 14:45:00-19:30:00
>UT 20:50:00-22:30:00
>
>Hobart:
>Your on your own here. I calculate you are recording for 6h25m, as
>you also have an 1h20m gap in the middle.
>
>Max: You have Mopra & Ceduna Recording for 6h25m total. I calculate this
>as 1478 (metric) Gigabytes. The disks have available 1526 Gigabytes. You
>may find the last few minutes are crap as the disks start to slow down. We
>will probably be able to tell you if this happens.
>
>On Parkes you have 5h55m scheduled. You could increase this a little, if
>you were daring, but again you may run into trouble at the end.
>
>Cheers
>Chris

Brett Reid
Observatory Manager, Radio Telescopes
University of Tasmania
School of Mathematics and Physics
phone + 61 3 6248 5285
email brett.reid_at_utas.edu.au
web http://www-ra.phys.utas.edu.au/~breid/
Received on 2004-11-12 23:37:01