• 제목/요약/키워드: space science

검색결과 14,544건 처리시간 0.049초

Hinode SOT Observation of Recursive Solar Tornados

  • Bong, Su-Chan;Cho, Kyung-Suk;Kim, Yeon-Han;Park, Young-Deuk;Chae, Jong-Chul
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2009년도 한국우주과학회보 제18권1호
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    • pp.60.2-60.2
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    • 2009
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국내 천문대 상공의 수증기량 조건과 적외선 관측 (PRECIPITABLE WATER VAPOR CONDITIONS FOR INFRARED OBSERVATIONS AT KOREAN ASTRONOMICAL OBSERVATORIES)

  • 이성호;백정호;문봉곤;진호;조정호;차상목;조승현;박영식;육인수;남욱원;박수종
    • Journal of Astronomy and Space Sciences
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    • 제24권4호
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    • pp.339-348
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    • 2007
  • 한국천문연구원은 $1\;-\;5{\mu}m$ 파장영역에서 관측 가능한 근적외선 카메라 KASINICS(Korea Astronomy and Space science Institute Near Infrared Camera System)를 개발하였다. 열적외선이 강해지는 $3{\mu}m$ 이상의 파장영역에서는 대기 중의 수증기에 의한 대기투과도가 중요해진다. 이 논문에서는 국내 천문대의 적외선 관측 조건을 알아보기 위해 한국천문연구원의 GPS 신호를 이용한 PWV(Precipitable Water Vapor) 측정 시스템을 사용하여 2006년 7월부터 2007년 8월까지의 보현산 및 소백산 상공의 월별 PWV 분포를 조사하였다. 그 결과, 국내 대기 수증기량 조건은 지표면의 이슬점온도를 이용해서 추정한 예상보다 좋았으며, 특히 가을철 및 겨울철에는 미국 Kitt Peak 천문대 상공의 조건과 비교하여 크게 다르지 않음을 확인하였다.

Conceptual Design of the NISS onboard NEXTSat-1

  • Jeong, Woong-Seob;Park, Sung-Joon;Park, Kwijong;Lee, Dae-Hee;Pyo, Jeonghyun;Moon, Bongkon;Park, Youngsik;Kim, Il-Joong;Park, Won-Kee;Lee, Duk-Hang;Park, Chan;Ko, Kyeongyeon;Matsumoto, Toshio;Takeyama, Norihide;Enokuchi, Akito;Shin, Goo-Whan;Chae, Jangsoo;Nam, Uk-Won
    • Journal of Astronomy and Space Sciences
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    • 제31권1호
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    • pp.83-90
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    • 2014
  • The NISS onboard NEXTSat-1 is being developed by Korea astronomy and space science institute (KASI). For the study of the cosmic star formation history, the NISS performs the imaging spectroscopic observation in the near-infrared range for nearby galaxies, low background regions, star-forming regions and so on. It is designed to cover a wide field of view ($2{\times}2$ deg) and a wide wavelength range from 0.95 to $3.8{\mu}m$ by using linear variable filters. In order to reduce the thermal noise, the telescope and the infrared sensor are cooled down to 200 K and 80 K, respectively. Evading a stray light outside the field of view and making the most use of limited space, the NISS adopts the off-axis reflective optical system. The primary and the secondary mirrors, the opto-mechanical part and the mechanical structure are designed to be made of aluminum material. It reduces the degradation of optical performance due to a thermal variation. This paper presents the study on the conceptual design of the NISS.

BITSE Preliminary Results

  • Bong, Su-Chan;Yang, Heesu;Lee, Jae-Ok;Kim, Yeon-Han;Cho, Kyung-Suk;Choi, Seonghwan;Baek, Ji-Hye;Park, Jongyeob;Kim, Jihun;Park, Young-Deuk;Kim, Rok-Soon;Lim, Eun-Kyung;Yashiro, Seiji;Makela, Pertti A.;Reginald, Nelson L.;Thakur, Neeharika;Gopalswamy, Natchimuthuk;Newmark, Jeffrey S.;Gong, Qian
    • 천문학회보
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    • 제46권1호
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    • pp.60.1-60.1
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    • 2021
  • The Balloon-borne Investigation of Temperature and Speed of Electrons in the corona (BITSE) is a technology demonstration mission launched in 2019 to observe the solar corona from ~3 Rs to 15 Rs at four wavelengths (393.5, 405.0, 398.7, and 423.4 nm). Preliminary analysis shows that BITSE imaged the solar minimum corona with the equatorial streamers on the east and west limbs. The narrow streamers observed by BITSE are in good agreement with the geometric properties obtained by the Solar and Heliospheric Observatory (SOHO) coronagraphs in the overlapping physical domain. In spite of the small signal-to-noise ratio we were able to obtain the temperature and flow speed of the western steamer. In the heliocentric distance range 4 - 7 Rs on the western streamer, we obtained a temperature of ~ 1.0 ± 0.3 MK and a flow speed of ~ 260 km s-1 with a large uncertainty interval.

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Correlation Between the “seeing FWHM” of Satellite Optical Observations and Meteorological Data at the OWL-Net Station, Mongolia

  • Bae, Young-Ho;Jo, Jung Hyun;Yim, Hong-Suh;Park, Young-Sik;Park, Sun-Youp;Moon, Hong Kyu;Choi, Young-Jun;Jang, Hyun-Jung;Roh, Dong-Goo;Choi, Jin;Park, Maru;Cho, Sungki;Kim, Myung-Jin;Choi, Eun-Jung;Park, Jang-Hyun
    • Journal of Astronomy and Space Sciences
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    • 제33권2호
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    • pp.137-146
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    • 2016
  • The correlation between meteorological data collected at the optical wide-field patrol network (OWL-Net) Station No. 1 and the seeing of satellite optical observation data was analyzed. Meteorological data and satellite optical observation data from June 2014 to November 2015 were analyzed. The analyzed meteorological data were the outdoor air temperature, relative humidity, wind speed, and cloud index data, and the analyzed satellite optical observation data were the seeing full-width at half-maximum (FWHM) data. The annual meteorological pattern for Mongolia was analyzed by collecting meteorological data over four seasons, with data collection beginning after the installation and initial set-up of the OWL-Net Station No. 1 in Mongolia. A comparison of the meteorological data and the seeing of the satellite optical observation data showed that the seeing degrades as the wind strength increases and as the cloud cover decreases. This finding is explained by the bias effect, which is caused by the fact that the number of images taken on the less cloudy days was relatively small. The seeing FWHM showed no clear correlation with either temperature or relative humidity.

Construction of Korean Space Weather Prediction Center: SCINTMON and All-Sky Camera

  • Kwak, Young-Sil;Hwang, Jung-A;Cho, Kyung-Suk;Bong, Su-Chan;Choi, Seong-Hwan;Park, Young-Deuk;Kyeong, Jae-Mann;Park, Yoon-Ho
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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    • pp.33.1-33.1
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    • 2008
  • As a part of the construction of Korean Space Weather Prediction Center (K-SWPC), Korea Astronomy and Space Science Institute (KASI) installed a Scintillation Monitor (SCINTMON) and an All-Sky Camera to observe upper atmospheric/ionospheric phenomena. The SCINTMON is installed in KASI building in Daejeon in cooperation with Cornell university and is monitoring the ionospheric scintillations on GPS L-band signals. All-Sky Camera is installed at Mt. Bohyun in Youngcheon in cooperation with Korea Polar Research Institute. It is used to take the photograph for upper atmospheric layer through appropriate filters with specific airglow or auroral emission wavelengths and to observe upper atmospheric disturbance, propagation of gravity wave and aurora. The integrated data from the instruments including SCINTMON and All-Sky Camera will be used for giving nowcast on the space weather and making confidential forecast based on some space weather prediction models.

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Efficiency of DRAO Radio Telescope

  • Jung, Jae-Hoon;Auh, Byung-Ryul;Cho, Se-Hyung;Kim, Hyun-Goo;Kim, Bong-Gyu;Park, Yong-Sun;Roh, Duk-Gyoo;Hong, Jung-Ho;Lee, Chang-Hoon;Yim, In-Sung;Choi, Moon-Hang
    • 천문학회보
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    • 제14권
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    • pp.8.1-8.1
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    • 1989
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Beyond the BOES ; IGRINS, GCLEF and GMTNIRS

  • Kim, Kang-Min;Park, Chan;Chun, Moo Young;Kim, Jihun;Oh, Jae Sok;Park, Sung-Joon;Jang, Jeong Gyun;Jang, Bi Ho;Lee, Sungho;Oh, Heeyoung;Yuk, In Soo
    • 천문학회보
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    • 제41권1호
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    • pp.59.2-59.2
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    • 2016
  • 보현산천문대가 준공되면서, 1.8 m 망원경이 연구자들에게 공개된지 20년이 되었다. 당시 보현산 천문대의 연구자들은 1.8 m 망원경을 도약망원경이라 부르면서, 우리나라 천문학의 비약적인 발전의 토대가 되기를 희망하였다. 보현산천문대 10주년 기념 담양 워크샵에서 BOES의 성과를 발표한 이후 10년 동안, 천문연구원 광학천문기술 그룹에서는 BOES 편광분광기와 IGRINS를 개발 완료하였으며, GMTNIRS의 개념설계와 GCLEF의 기본설계가 진행되었다. 여기에서는 그동안 개발된 고분산 천체분광기 프로젝트의 성과를 정리하고, 앞으로의 계획을 논의한다.

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Status and Plan of KMTNet Operation

  • Lee, Chung-Uk;Kim, Seung-Lee;Lee, Dong-Joo;Cha, Sang-Mok;Lee, Yongseok;Kim, Dong-Jin;Park, Hong Soo;Bang, Seung-Cheol;Kang, Hyunwoo;Hong, Sungwook E.;Kim, Jae-Woo
    • 천문학회보
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    • 제46권1호
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    • pp.59.1-59.1
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    • 2021
  • 외계행성 탐색시스템 2020년 운영현황과 2021년 계획을 보고한다. 2020년은 코로나-19 팬데믹으로 인해 칠레와 남아공 관측소에서는 3월 중순부터 관측이 중단된 바 있으나, 연말부터 재가동을 시작하여 2021년 현재 3개 관측소가 모두 정상가동하고 있다. 2020년 관측장비 가동율은 99.3% 이었다. 천문박명시간 기준으로 5877.2 시간이 할당되었고, 이중 4069.7 시간 동안 관측이 이루어져 관측율은 75.2% 이었다. 이 발표에서는 2020년 날씨통계 및 주요 관측 장비의 성능 개선과 함께 2021년 관측 및 시스템 개선 계획을 소개한다.

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