A2351: xband HE rrl's

Intro:

Pointing/calibration checks:

• Page 1: calibration. Gain, Tsys, Sefd, and avgBeamwidth for all the data
  
• B1622+238 shouldn't be used for pointing or gain checks at xband. It has a width of 24 asecs which is close to the beam width.
• B1607+268 at za=13 was taken on on 02jul08. For some reason this pattern had about 1/2 the gain of the 3 other patterns for this source before transit. The fit for the 4th board didn't converge at all.
  
• The pointing error for the 3 boards that did fit is close to 0.
• I looked at the tiedown tensions since it was at az=131 which is close to pointing at td4, but the tensions did not go to zero.
• Page 2: coma, 1st sidelobe, beam efficiency(main beam), beam efficiency (main Beam + 1st sidelobe).
• The coma is large at hi za. This is probably coming from the shimming of the za rails.
  
• B1622+238 should be ignored because it is extended.
• Page3: pointing errors all data:
  
• 1,2nd plots: za errors vs za and az.
  
• 3rd,4th plots: az errors vs za,az
• Page4: pointing errors 30jun08. Prior to  01jul08 the za Errors have a mean offset of about 5 asecs. I removed 4 asec from the model  on 01jul08 15:00.
• Page5: pointing errors after 4asec offset removed in za constant term. The offset is now close to zero .
• Page6: pointing errors vs az,za. The length of the tick mark is proportional to the pointing error. 1 tick mark is 5 asecs. The direction of the arrow is the direction of the error.

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