Status on Kunming station Longfei Hao 2018.3.19 Shanghai Outline - PowerPoint PPT Presentation

Status on Kunming station Longfei Hao 2018.3.19 Shanghai

Outline  Background  EVN Observations  Outlook

Construction: Basement construction and antenna mounting (Aug. 2005—May 2006) designed by CETC Institute No. 39

Location: Kunming station in Google Altitude : ~1950m 16km 10km Longitude:102 ° 47'42" latitude:25 ° 01'33"

Data down-linking with Miyun 50m BEIJING KUNMING

Purpose ： CVN for Lunar Project 50m 2006 1993 1987 25m 25m\65m 2006 2006 VLBI center 40m

key specifications 2. Antenna performance Prime dish Diameter 40m Mounting Azimuth-Zenith Surface(<26m) Solid aluminum panel Surface(26-40m) Stainless steel mesh Shape accuracy(<26m) ~0.5 mm (rms) Shape accuracy (26-40m) ~2.5 mm(rms) Pointing accuracy ~28’’ Optics Cassegrain; f/D=0.35

working bands S X C(new) Frequency 2150~2450M 8200~9000M 4000~8000M range Hz Hz Hz Polarization L&R L&R L&R LO 2000MHz 8100MHz optional Tsys 50K(Room 50K(Cooled) 35K TEMP.) Efficiency ~60% ~45% ~50%

Radio Environment (4040—7500 MHz) (7500—9100 MHz) Good ！

VLBI terminal  C h i n e s e D a t a A c q u i s i t i o n S y s t e m ( C D A S , S H A O )  I n p u t f r e q u e n c y r a n g e : 0 - 5 1 2 M H z  3 2 C h a n n e l s ( i n c l u d i n g U S B a n d L S B )  O u t p u t : 0 . 1 2 5 , 0 . 2 5 , 0 . 5 , …, 3 2 M H z  M a r k 5 B + r e c o r d e r  S u p p o r t 2 G b p s o b s e r v a t i o n s  T i me a n d F r e q u e n c y S y s t e m  1 p p s c o u n t e r  w e a t h e r i n s t r u me n t  G P S  5 M H z & 1 p p s ( H - ma s e r )

New instruments  H - Ma s e r  F r o m U S A  D i s t r i b u t i o n s y s t e m  D B B C 2 + Ma r k 6

EVN observation: First fringes to EVN(S/X) On 17 Jun 2009, the Kunming telescope participated in the EVN network monitoring experiment N09SX1 for the first time. We successfully detected fringes to the other EVN telescopes. The image shows the fringe on the baseline Kunming -- Effelsberg (7728 km). New 7 baselines were established, there are 5 baselines are over 7000km!

Ongoing : C band fringe test with EVN(201 6)  Oct 20~21 2016 N16M3&N16C3 5cm 6cm/1Gbps 6cm/2Gbps

Ongoing : Sessions of EVN(2017)

Ongoing : Sessions of EVN(2018)  2018.2-2018.3 5cm 6cm/1Gbps 6cm/2Gbps

Ongoing : Sessions of EVN  2018.2-2018.3

Ongoing : Become an associate member?

outlook  1.Thanks for the support from the foreign and Chinese VLBI colleagu es.  2.Kunming telescope has taken part in some VLBI observations with EVN ， CVN ， EAVN and IVS. We realize that the international VLBI cooperation is very important to promote our research and technique capabilities.

谢 谢 ！ Thanks! Any comments please contact: haolongfei@ynao.ac.cn