新安裝50MHz專用Yagi 4 eles HB流星電波高感度增益接收天線.

在1999年9月安裝日本 comet製高感度單指向

天線,對向日本九州 Miyazaki 市立大學的示標

電台方向.此天線增益高達10.3dBi,可偵測到

約10等以上微流星(10的負5克重量微流星)

The 50MHz antenna was made by comet Japan.It was aim at MIYAZAKI University 50.0169MHz (USB)beacon radio station.This antenna could be gained about 10.3dBi by 4 elements HB Yagi of type.We found this system could detect probably 10.3 mag of micro meteors...

Observer: Garfield Tsao (BM2EQB)
Location: LonTan Observatory
LonTan, TauYan, Taiwan (121 14'37" E, 24 52'54" N by GPS)
Frequency: 50.0169 MHz USB mode 3 kHz width.
Antenna : Comet made 50MHz Yagi HB 4 element (gain 10.3 dBi)
astronomical azimuth 225 deg (=NE), elevation 7 deg.
Transmitter: , USB mode, 50 W (24 hours),
distance about 1125 km from Lon Tan.

圖左:2000年流星電波初步觀測設備(PCR-1000) 圖右:2002年新購R-75及太陽VLF觀測設備.

流星信號接收及處理觀測設備:(現已更新設備 )

左邊電腦為486PC控制PCR-1000的接收軟體

(近更新為頻率解析版本).天線接收的信號經

過PCR-1000硬體轉成音頻信號.信號分為兩個

通路,一個進入手提電腦,利用聲霸介面作音

頻數位處理.此數位信號經FFTDSP轉體轉換

和分析.並進入A/D轉成數據經另一部電腦PC

分析和記錄(900Hz 音頻信號專用低頻濾波檢測).

Receiver: Icon PCR-1000 computer controlled all band receiver
Sensitivity: 0.25 uV for 10 dB S/N for USB mode

Observing method: the beacon 900 Hz voice signal (by FFTDSP) is received by a low frequency filter (900 Hz) and fed into the D/A converter and computer in real time.

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Mar 20 2000 LonTan HRO(BM2EQB)