From: <Chris.Phillips_at_email.protected>
Date: Mon, 15 Nov 2004 00:33:50 +1100 (EST)

Another message from Max...

Cheers
Chris
------------------------------------------------------

Hi Chris

I hope you've seen my reply to Giuseppe Cimo. I made a mistake in the
diagram below; to make it reflect the schedule you should shift the first
four subbands down by 16MHz.

On Fri, 12 Nov 2004, Chris Phillips 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.
>
>The basic frequency setup is:
>
>Frequencies: 1 mode 'sprdS'
>LSB USB LSB USB LSB USB 8 16MHz channels, 512Mbps
>RCP \_/ \_/ \_/ \_/ \_/ \_/
>LCP \_/ \_/
>|
>2039.99-2055.99 LSB RCP \__=> Cassini, MEX spacecraft
>2055.99-2071.99 USB RCP in this band.

hould be 2023.99-2039.99 LSB RCP
           2039.99-2055.99 USB RCP

> 2139.99-2155.99 LSB RCP
>2155.99-2171.99 USB RCP

hould be 2123.99-2139.99 LSB RCP
           2139.99-2155.99 USB RCP

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

     OK

>This requires 2 DAS with each USB/LSB being the output from one IFP of the
>DAS.
>
>For the 4 bands the *central* frequency of the input to the DAS will be
>2055.99, 2155.99, 2286.99 & 2286.99 MHz.

Should be 2039.99, 2139.99, 2286.99 & 2286.99 MHz.

> The ATCA and Ceduna will only
>record the 2270.99 - 2302.99 MHz channels (dual pol).
>
>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.

Dat klopt. I kept within the disk limits I was told. I could have had Ho
come in after a slightly shorter break, but it was more convenient to keep
in synch with Cd & Mp.

>
>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.

Parkes is in as much as visibility allows, and sometimes more. I
scheduled some Pk & Gb overlapping scans even though SCHED says they're
never simultaneously visible to the source, in case SCHED is too
conservative.

-Max
Received on 2004-11-15 00:34:13