To perform CSO observations.

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Starting heterodyne observing from the UIP:
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1) telnet alpha1: username and password, and type UIP
2) get into AOS mode:
     -set up a junk file: UIP> data junk.dat 1001
     -start the AOS processes: UIP> aos /noaos1/aos2/noaos3/noaos4/aos5 /restart
 (AOS1=500MHz, AOS2=50MHz, AOS3=500MHz(second one), AOS4=1.5GHz, AOS5=4GHz bandwidth)
  if not working, exit UIP (^X or ^Y) and start again. 
  if still not working: make sure you are observing a source (track not idle), 
  reset the backend computer (see in the problems section).
     -start up the real data file: UIP> data cso20dec2004.dat 1001 
  you should always start your observations with the scan number 1001
  all your observations will be stored into this big data file
  check as soon a possible that you can read it, as it sometimes appears 
  as an old VAX format that you won't be able to read (on hapuna: 
  cd /user_vax/your_name, then class and file in cso20dec2004.dat).
3) UIP> fcal
  this stores in the data file information about the spectrometer frequency calibration
4) UIP> focus /stealthy (if not already there)
5) Make sure the tertiary mirror is in position
6) cat co_point_star  (define the pointing stars catalog)

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Setting up the 345GHz receiver :
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1) UIP> point 345_side
2) Slew to your source (planet uranus or observe L1544 for example)
3) lo H2DP  /force  (load your line, the /force command is needed 
when difficulties to lock the gun)
4) Tune the receiver!!!!!

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Tune the receivers:
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If already tunned, then:
1) Turn on receiver with handheld computer on the side cabin:
      - select your receiver
      - RX/DL (instead of DUMMY ON)
      - CONSTANT V (instead of OPEN L)
2) De-attenuate: attenuator clockwise until you get some power
3) Turn on the magnetic field (aluminium box)
4) Turn on the multipliers 

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Shutting down the 345GHz receiver:
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Before leaving for the night, make sure that you do the following:
1) Turn the attenuator all the way counter clockwise (attenuate)
2) Turn off the magnetic field supply (aluminium box)
3) Turn off receiver with handheld computer:
      -OPEN L (instead of CONSTANT V)
      -DUMMY ON (instead of RX/DL)
      -go to the MAIN screen (choice between 345 and 650)
4) close the dome
5) lo /nogun
6) stow
7) idl    ----> when stoped
8) push the red button on the right side      
      
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Defining the observation mode:
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1) If you want to use the wobbler:
      -UIP> sec 180 0.5678 ---> chop throw of about 180" with a 
chopping frequency of 0.5Hz. You can go further, but the efficiency will 
be worse...
      -you will get the PIDG number (in this case: 1.7 4.2 4.6 4.2)
and you will have to check in the side cabin if this values are 
correctly set (important so you will have a good efficiency for the 
chopping).
      -UIP> sec 180 0.5123  
and wait till the beam switching value (in the last line of the antenna 
computer display) stops blinking (the chopper value is converging and 
it can last few minutes).
      -you can then chop: UIP> chop 3 (set to 3 seconds)
2) If you want to use the position switching mode:
      -sec /stop (to stop the secondary if you are in chopper mode)
      -oo 1 /step=120  (1s integration with a position switching of 120")
You can use oo /designated so you can observe the off position defined 
from the source you entered (see section "catalogs").
      
      
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Pointing:
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1) Slew to the pointing source
2) Set the integration time, for example 5 seconds: UIP> aos 5
It should be longer for weak source and shorter for bright sources
3) Do a receiver gain calibration: UIP> cal
Define the throw for very extended pointing source 
(ex: UIP> cal /off=300), in which case it is probably not a very 
good pointing source...     
4) Define how you want to perform the observation
     -wobbler: UIP> sec 60 0.5123 (if you use a chop throw of 180" you 
won't be able to see Uranus, so define the chop throw as in the previous 
section)
     -UIP> cal
     -five 10 (five points at 10" from the center, so you check the 
pointing: approximately the value of half a beam: it the depends on the 
frequency). The computer is trying to converge to a suggested value of 
FAZO and FZAO. This value is changing during the night, so you should do 
a pointing every 3 hours. Check on the values from the "five" command, 
and move the value of fazo and fzao (more negative or positive). Example:
UIP> five 10 
                     700
     ------->  1600 1473 800
                    1500
The previous values for FAZO and FZAO are -120 and 15 respectively. So you 
should try: UIP> fazo -135 and UIP> fzao 25 
Start again the UIP> five 10 and you can get something like:
                    1484
     ------->  1080 1722 1477
                    1032
This time, it is most likely that you should get a suggestion: (Proposed:
fazo=-130.5 and fzao=20.9)
Once you get a suggestion (and that you actualy saw the continuum of the planet 
or the line) accept it and do it one more time to be sure.
If there is no suggested value, check on the 
values found for the last pointing (few days ago) and try with them. 
5) Do you want to point on a planet or a pointing star from the calalog?
     -planet: 
a) chopper
UIP> planet uranus
UIP> sec 60 0.5123
UIP> cal
UIP> five 10
b) position switching
UIP> planet saturn
UIP> sec /stop
UIP> five 10 /aos=2
UIP> cal
UIP> chop 1    -----> so you can compute the beam efficiency with the 
planet sofware later)

     -co point star
a) chopper
UIP> cat co_point_star
UIP> obs irc10011
UIP> lo 12CO2-1-3
UIP> cal
UIP> sec 90 1.123
UIP> chop 1   (see the line? If yes: define the baseline (50 to 100 channels 
before the line, and 50 to 100 channels after the line)
UIP> aos 5 390 440 540 600 (if the line is broad you can use another AOS than 
the 50MHz)
UIP> five 15 /aos=3
etc......
UIP> aos /debase (to get rid of the baseline)

b) position switching
UIP> oo 1 /step=300
UIP> aos 5 390 440 540 600 (if the line is broad you can use another AOS than 
the 50MHz)
UIP> five 15 /aos=3
etc......
UIP> aos /debase (to get rid of the baseline)


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Catalogs:
---------------------------------------------------
-UIP> ver L1544*    ----------> check in various source catalogs
-UIP> cat /line [vastel]private_catalog.line_cat  ---> if you want 
to get my catalog (the lines and sources I defined)
-UIP> source pouet    --------> enter a new source (enter ra and dec and Vlsr; 
careful enter 0 for the values of the velocity in ra and dec or it won'y 
ask you for the epoch...)
-UIP> source pouet \off_position   -----> enter the off position of an 
existing source
-UIP> line pouet   -----> enter a new line called "pouet": you will be ask
for the upper or lower sideband (easy depending fromwhere you are on the 
atmospheric transmission: upper if the line is on atmospheric transmission 
curve going downhill, lower if going uphill), and the multiplier (3@230GHz,
4@345GHz, 6@450GHz, 6@650GHz, and 6 between 780-840GHz, 12 beween 840-920GHz).
-UIP> ver h2d* /line   ----> check on all the lines starting by h2d
-UIP> forget pouet     ----> remove this source from your catalog
-UIP> forget junk /line ----> remove this line from your catalog
-UIP> ver L1544 /alt   ----> verify where your source is on the sky

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Miscellaneous:
---------------------------------------------------
- You can get help on UIP, typing UIP> help chop for the chop command 
for example).
- On puuoo, you should type: "orrery &" so you can get the sky and the 
positions of the planets, the CO point stars, your source, ...and the Sun!
- be careful in the morning, that the Sun do not hit the secondary mirror.
- When the lock can't be done, and the needle is overloaded (completetly 
on the right) then go to a line on another receiver (go to a 12CO21 line 
if you are at 345GHz for example) without moving the mirror, and come back 
again to your line.
- On the antenna computer display, you can sometimes get a red warning 
saying "Attenuation zero", which means that you don't get enough power. 
Go to the side cabin, and get more power (hit the small black button near 
the rceiver you are observing with, so you can get more power, and 
decrease it with the drill indicating number--not digital).
- Wait 30 seconds after each "cal" command.
- On UIP, we often have the warning "The AD converter is within its proper 
range". Type UIP> adj to adjust.
- Always check that the Gunn is locked (on the antenna computer display). 
If unlocked, go and check the tunning (play smoothly and slowly with the 
tunner) so the needle triggers the green light and that the needle is 
exactly in the middle (more stable).
- Don't observe when the source is too high (lower that za=25-30 degrees), 
and too low (elevation less than 30 degrees). 
- You can use the "repeat" command on UIP: UIP> repeat 3 chop 3
- If you want to perfom a map: UIP> rao 20 /map and UIP> deco 20 /map, 
for example. Careful to put back these numbers to zero when you change 
source.  


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Problems:
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1) Backend computer misbehaving:
-check backend computer on hapuna with "ping bck"
-check AOS processes and kill them. On alpha1 "show sys" and "stop/id=XXX" 
XXX=numbers (not those in brackets).
-if not better, perform a soft reboot: telnet bck, user root, password: 
ask for it, reboot -a; then press reset button and wait...ping bck.
-antenna /restart=all/nosync   ----> restart the antenna computer

2) Sometimes the spectra display does not show the spectra while integrating:
-a: under UIP, stop AOS by "AOS/noaos2/noaos5" (if aos2 and 5 are the
ones you were using), then move over to the console of puuoo and logout
user "visitor" from the console, and upon the KDE login window, log back
in as visitor (no passwd needed).  This way X has been restarted on
puuoo.  Now back to your UIP session and restart AOS by
"AOS/aos2/aos5/restart".  The spectral displays should be okay (for
awhile, at least).
                                                                                
b: set the AOS displays on kilauea.  To do that, firstly kill the
exsisting AOS displays ("AOS/noaos2/noaos5").  Then on a regular kilauea
window enable remote display ("xhost +").  Back to your UIP session to
start AOS display on kilauea (the right-hand-side monitor, for example),
by "AOS/aos2/aos3/display=128.171.86.66:0.1 restart".  Remember though
to
kill the AOS before you log off kilauea in the morning, and re-start AOS
with display on kilauea the first thing you get into UIP when you come
upin the afternoon.

3) When you get a Chopper Alarm on the antenna computer display, go in the 
side cabin, and Stop and Start buttons under the PIDG knobs.

4) If the system temperature found after a cal is too high, then there is 
a problem!!!! check if the mirrors are aligned (force the mirror to move 
when you load the line; careful, za must be lower than 45 degrees so the 
mirror can move): UIP> lo your_line /force.