RASFX&&Correlator&Processing&Resultiaaras.ru/media/seminar/2016-zhuravov.pdf · 2016-09-15 · 200 175 150 125 100 75 50 25 -25 -75 -100 -125 -150 57590 o 57596 o 57600 MJD RASFX

RASFX    Correlator  Processing  Result

D.Zhuravov1,  A.Melnikov1,  S.Kurdubov1,  I.Surkis1,  V.Ken1,  V.Mishin1,   V.Shantyr1,  N.Mishina1,  Y.Kurdubova1

1  –  IAA  RAS,  Saint-­‐Petersburg,  Russia

Since  November,  2015  RASFX  correlator  has  been  processing  sessions  of  observaMons  with  RT-­‐13M  antennas  of  Badary  and  Zelenchukskaya  observatories  in  S/X,  S/X/Ka,  X/Ka  bands.    Roughly  900  sessions  has  been  completed.  Percentage  raMos  of  different  bands  are  shown  in  diagram  1.

All  sessions  proceeded  by  correlator  are  single-­‐based,  has  a  bandwidth  512  MHz  and  2-­‐bit  sampling.    

 Following  frequency  seXng  has  been  used:  •  1  S-­‐channel  with  right  and  leZ  polarizaMons+  2  X-­‐channels  

with  right  polarizaMon  •  1  S-­‐channel  +  1  X-­‐channel  with  right  polarizaMon;  •  1  S-­‐channel  +  3  X-­‐channels  with  right  polarizaMon;  •  1  S-­‐channel  +  1  Ka-­‐channel  with  right  polarizaMon;  •  1  S-­‐channel  with  right  and  leZ  polarizaMons+  3  X-­‐channels  

with  right  polarizaMon;  •  1  S-­‐channel  +1  X-­‐channel  +  1  Ka-­‐channel  with  right  

polarizaMon;  •  1  S-­‐channel  +  3  X-­‐channels  with  right  polarizaMon  and  1  S-­‐

channel  +  3  X-­‐channels  with  leZ  polarizaMon.  Diagram  2  shows  observaMon  intensity  per  month.  

Diagram  1.  Percentage  raMos  of  bands

Diagram  2.  Number  of  sessions  per  month

S/X 80%

S/X/Ka 5%

X/Ka 15%

0 20 40 60 80

100 120 140 160 180

Num

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f ses

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Fig  3.  Comparison  between  DiFX  and  RASFX  correlators