{"id":4343,"date":"2005-05-06T02:00:16","date_gmt":"2005-05-05T17:00:16","guid":{"rendered":"https:\/\/bunshiro.love\/?p=4343"},"modified":"2005-05-06T02:00:16","modified_gmt":"2005-05-05T17:00:16","slug":"announcement-of-the-first-qsos-via-the-moon-on-47-ghz","status":"publish","type":"post","link":"https:\/\/bunshiro.love\/?p=4343","title":{"rendered":"Announcement of the first QSOs via the moon on 47 GHz"},"content":{"rendered":"

\u7530\u6751\u3067\u3059
\n\u3000\uff12\uff10\uff10\uff15\u5e74\uff14\u6708\uff11\uff16\u65e5\u306b\u59cb\u3081\u3066\u306e\uff14\uff17\uff27\uff28\uff5a\u3067\u306e\u6708\u9762\u53cd\u5c04\u901a\u4fe1\u304c\u6210\u529f\u3057\u307e\u3057\u305f\u3002
\n\u3000\u6210\u529f\u3057\u305f\u30e1\u30f3\u30d0\u30fc\u306fRW3BP, AD6FP, W5LUA, and VE4MA\u3068\u8a00\u3046\u602a\u7269\u3068\u8a00\u3046\u304b\u3061\u3087\u3063\u3068\u30af\u30ec\u30fc\u30b8\u30fc\u3068\u3044\u3046\u304b\u96f2\u306e\u4e0a\u306e\u4eba\u3068\u8a00\u3046\u304b\u30fb\u30fb\u30fb\u30fb\u75c5\u4eba\u305e\u308d\u3044\u3067\u3059\u3002
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\n\u3000\u7b2c\u4e00\u5831\u3092\u4f1d\u3048\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3082\u8f09\u305b\u307e\u3059\u3002<\/p>\n

\u7b2c\u4e00\u5831
\nApril 16, 2005 – Announcement of the first QSOs via
\nthe moon on 47 GHz.<\/p>\n

The team of RW3BP, AD6FP, W5LUA, and VE4MA would like to announce
\nthat the first 47 GHz contacts via the moon have been completed.
\nAs you may recall, RW3BP heard the first lunar echoes on 47 GHz
\nback in August of 2004. At that time he was heard by AD6FP, W5LUA,
\nVE4MA and VE7CLD. Since the receipt of the first 47 GHz echoes
\nvia the moon, numerous tests between RW3BP and
\nAD6FP led to improvements by RW3BP allowing him to copy calls
\nfrom the lower power signal of AD6FP in January of 2005.
\nAs of April 16, 2005 the team of AD6FP, W5LUA and VE4MA have each
\ncompleted a CW QSO via the moon with RW3BP.
\nThe station at RW3BP consists of a 2.4M offset fed dish and 100
\nplus watts while the station at AD6FP consists of a 1.8M offset
\nfed dish and 30 watts. At W5LUA and VE4MA 2.4M offset fed dishes
\nand 30 watt TWTs were used. Noise figures of all stations are in
\nthe 3.5 to 4.7 dB range.<\/p>\n

Since the doppler shift can be as much as 100 + kHz at 47 GHz, one
\nmust continuously adjust the receive frequency to keep the station
\ncentered in the passband. Precision frequency control was obtained
\nby using GPS controlled, Rubidium locked, or TV sync controlled
\nphase locked local oscillators. Various techniques were in use to
\nkeep the Doppler shifted frequency in the passband of the receivers.
\nSubmitted by RW3BP, AD6FP, W5LUA and VE4MA<\/p>\n

\u304a\u8fd4\u4e8b
\nBun
\nThanks for the congrats! It was a lot of hard work.
\n73
\nAl W5LUA<\/p>\n

\u5199\u771f\u4ed8\u304a\u8fd4\u4e8b
\n
\n
\nBun
\nHere are a couple of pictures and info on my system
\nThe 47 GHz EME station at W5LUA consists of a 2.4M offset
\nfed dish with a dual mode W2IMU feed. Receive noise figure
\nis approximately 4.75 dB noise figure. The converter uses dual
\nconversion for good image rejection. The first IF is 8.01 GHz
\nwhile the second IF is 144 MHz which is fed to an FT-847.
\nI use K5GW moon tracking software which also controls the receive
\nfrequency to keep the Doppler shifted frequency in the receive
\npassband. LOs are GPS locked. A similar upconversion scheme is
\nused on transmit. The driver at 47 GHz is an Agilent Technologies
\nAMMC-5040 which provides the drive for a surplus Hughes traveling
\nwave tube that provides 30 watts at 47 GHz. All equipment except
\nfor the 2M IF is located at the feed of the dish. US Digital
\nencoders are used to keep the dish within .05 degrees of being
\naimed at the center of the moon. This is especially important at
\n47 GHz since the 3dB beamwidth of the dish is only 0.2 degrees
\nand the first sidelobes are at the edge of the moon. My best
\nsun noise measures 7.2 dB while the best moon noise measured is 0.6dB.
\nAl Ward
\nW5LUA
\nMay 4, 2005<\/p>\n","protected":false},"excerpt":{"rendered":"

\u7530\u6751\u3067\u3059 \u3000\uff12\uff10\uff10\uff15\u5e74\uff14\u6708\uff11\uff16\u65e5\u306b\u59cb\u3081\u3066\u306e\uff14\uff17\uff27\uff28\uff5a\u3067\u306e\u6708\u9762\u53cd\u5c04\u901a\u4fe1\u304c\u6210\u529f\u3057\u307e\u3057\u305f\u3002 \u3000\u6210\u529f\u3057\u305f\u30e1\u30f3\u30d0\u30fc\u306fRW3BP, AD6FP, W5LUA, and VE4MA\u3068\u8a00\u3046\u602a\u7269\u3068\u8a00\u3046\u304b\u3061\u3087\u3063\u3068\u30af\u30ec\u30fc\u30b8\u30fc\u3068\u3044\u3046\u304b\u96f2\u306e\u4e0a\u306e\u4eba … <\/p>\n

“Announcement of the first QSOs via the moon on 47 GHz” \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[2],"tags":[],"class_list":["post-4343","post","type-post","status-publish","format-standard","hentry","category-xoops"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t