Pub Date : 2023-05-26DOI: 10.1142/s2251171723500058
Ó. Restrepo, F. Lucero, G. Chaparro, R. Rodríguez, F. Pizarro, R. Bustos, M. Diaz, F. Mena
{"title":"Optimization of Antenna Performance for Global 21-cm Observations and Verification Using Scaled Copies","authors":"Ó. Restrepo, F. Lucero, G. Chaparro, R. Rodríguez, F. Pizarro, R. Bustos, M. Diaz, F. Mena","doi":"10.1142/s2251171723500058","DOIUrl":"https://doi.org/10.1142/s2251171723500058","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49414229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-26DOI: 10.1142/s2251171723400081
Richard Cloete, Phillip G. Bridgham, Sergei Dobroshinsky, Carson Ezell, Andriy Fedorenko, F. Laukien, Sarah Little, A. Loeb, Eric Masson, Matthew Szenher, W. Watters
{"title":"Integrated Computing Platform for Detection and Tracking of Unidentified Aerial Phenomena (UAP)","authors":"Richard Cloete, Phillip G. Bridgham, Sergei Dobroshinsky, Carson Ezell, Andriy Fedorenko, F. Laukien, Sarah Little, A. Loeb, Eric Masson, Matthew Szenher, W. Watters","doi":"10.1142/s2251171723400081","DOIUrl":"https://doi.org/10.1142/s2251171723400081","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42265067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-11DOI: 10.1142/S2251171723500046
H. Yama, D. Suzuki, S. Miyazaki, A. Rakich, T. Yamawaki, R. Kirikawa, I. Kondo, Y. Hirao, N. Koshimoto, T. Sumi
We describe the optical alignment method for the Prime-focus Infrared Microlensing Experiment (PRIME) telescope which is a prime-focus near-infrared (NIR) telescope with a wide field of view for the microlensing planet survey toward the Galactic center that is the major task for the PRIME project. There are three steps for the optical alignment: preliminary alignment by a laser tracker, fine alignment by intra- and extra-focal (IFEF) image analysis technique, and complementary and fine alignment by the Hartmann test. We demonstrated that the first two steps work well by the test conducted in the laboratory in Japan. The telescope was installed at the Sutherland Observatory of South African Astronomical Observatory in August, 2022. At the final stage of the installation, we demonstrated that the third method works well and the optical system satisfies the operational requirement.
{"title":"Optical Alignment Method for the PRIME Telescope","authors":"H. Yama, D. Suzuki, S. Miyazaki, A. Rakich, T. Yamawaki, R. Kirikawa, I. Kondo, Y. Hirao, N. Koshimoto, T. Sumi","doi":"10.1142/S2251171723500046","DOIUrl":"https://doi.org/10.1142/S2251171723500046","url":null,"abstract":"We describe the optical alignment method for the Prime-focus Infrared Microlensing Experiment (PRIME) telescope which is a prime-focus near-infrared (NIR) telescope with a wide field of view for the microlensing planet survey toward the Galactic center that is the major task for the PRIME project. There are three steps for the optical alignment: preliminary alignment by a laser tracker, fine alignment by intra- and extra-focal (IFEF) image analysis technique, and complementary and fine alignment by the Hartmann test. We demonstrated that the first two steps work well by the test conducted in the laboratory in Japan. The telescope was installed at the Sutherland Observatory of South African Astronomical Observatory in August, 2022. At the final stage of the installation, we demonstrated that the third method works well and the optical system satisfies the operational requirement.","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41470361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-11DOI: 10.1142/s2251171722400086
J. Pandey, Sadhana Singh, R. Yadav, N. Nanjappa, Jayshreekar Pant, Mukesh Kumar, Sanjit Sahu
{"title":"Upgradation of AIMPOL instrument on the 104-cm Sampurnanand telescope of ARIES","authors":"J. Pandey, Sadhana Singh, R. Yadav, N. Nanjappa, Jayshreekar Pant, Mukesh Kumar, Sanjit Sahu","doi":"10.1142/s2251171722400086","DOIUrl":"https://doi.org/10.1142/s2251171722400086","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46904746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-09DOI: 10.1142/s2251171723500095
Aidan Walk, C. Claveau, M. Bottom, M. Chun, S. Jacobson, M. Service, Jessica R. Lu
Geometric optical distortion is a significant contributor to the astrometric error budget in large telescopes using adaptive optics. To increase astrometric precision, optical distortion calibration is necessary. We investigate using smartphone OLED screens as astrometric calibrators. Smartphones are low cost, have stable illumination, and can be quickly reconfigured to probe different spatial frequencies of an optical system's geometric distortion. In this work, we characterize the astrometric accuracy of a Samsung S20 smartphone, with a view towards providing large format, flexible astrometric calibrators for the next generation of astronomical instruments. We find the placement error of the pixels to be 189 nm +/- 15 nm RMS. At this level of error, milliarcsecond astrometric accuracy can be obtained on modern astronomical instruments.
{"title":"Smartphone screens as astrometric calibrators","authors":"Aidan Walk, C. Claveau, M. Bottom, M. Chun, S. Jacobson, M. Service, Jessica R. Lu","doi":"10.1142/s2251171723500095","DOIUrl":"https://doi.org/10.1142/s2251171723500095","url":null,"abstract":"Geometric optical distortion is a significant contributor to the astrometric error budget in large telescopes using adaptive optics. To increase astrometric precision, optical distortion calibration is necessary. We investigate using smartphone OLED screens as astrometric calibrators. Smartphones are low cost, have stable illumination, and can be quickly reconfigured to probe different spatial frequencies of an optical system's geometric distortion. In this work, we characterize the astrometric accuracy of a Samsung S20 smartphone, with a view towards providing large format, flexible astrometric calibrators for the next generation of astronomical instruments. We find the placement error of the pixels to be 189 nm +/- 15 nm RMS. At this level of error, milliarcsecond astrometric accuracy can be obtained on modern astronomical instruments.","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45804983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-01DOI: 10.1142/s2251171723020014
Richard Cloete, Wesley Andrés Watters, Sarah Little, Abraham Loeb, Anthony Lux
{"title":"Preface: Instrumentation and Software for the Detection and Characterization of Unidentified Aerospace Phenomena","authors":"Richard Cloete, Wesley Andrés Watters, Sarah Little, Abraham Loeb, Anthony Lux","doi":"10.1142/s2251171723020014","DOIUrl":"https://doi.org/10.1142/s2251171723020014","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135532529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-18DOI: 10.1142/s2251171722400074
A. Jaiswal, M. Naja, S. Bhattacharjee, B. Kumar, S. Ananthakrishnan
{"title":"First study of optical turbulence over an astronomical site in the Central Himalayas using ST radar observations","authors":"A. Jaiswal, M. Naja, S. Bhattacharjee, B. Kumar, S. Ananthakrishnan","doi":"10.1142/s2251171722400074","DOIUrl":"https://doi.org/10.1142/s2251171722400074","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46751328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-18DOI: 10.1142/s2251171722400062
R. Yadav, Aditya Jaiswal, Arvind K. Dattatrey, S. Yadav, N. Nanjappa, N. Panwar, M. Jaiswar, Krishna Reddey, Jayshreekar Pant, B. Medhi
{"title":"Characterization and performance of the 4k × 4k CCD camera mounted on 104-cm Sampurnanand telescope","authors":"R. Yadav, Aditya Jaiswal, Arvind K. Dattatrey, S. Yadav, N. Nanjappa, N. Panwar, M. Jaiswar, Krishna Reddey, Jayshreekar Pant, B. Medhi","doi":"10.1142/s2251171722400062","DOIUrl":"https://doi.org/10.1142/s2251171722400062","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48546193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-16DOI: 10.1142/s2251171722400050
S. Bhattacharjee, M. Naja, A. Jaiswal, K. Rawat, R. Sagar, S. Ananthakrishnan
{"title":"ARIES ST Radar: The first Central Himalayan wind profiler","authors":"S. Bhattacharjee, M. Naja, A. Jaiswal, K. Rawat, R. Sagar, S. Ananthakrishnan","doi":"10.1142/s2251171722400050","DOIUrl":"https://doi.org/10.1142/s2251171722400050","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47373889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-17DOI: 10.1142/s225117172340007x
E. Keto, W. Watters
{"title":"Detection of Moving Objects in Earth Observation Satellite Images","authors":"E. Keto, W. Watters","doi":"10.1142/s225117172340007x","DOIUrl":"https://doi.org/10.1142/s225117172340007x","url":null,"abstract":"","PeriodicalId":45132,"journal":{"name":"Journal of Astronomical Instrumentation","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48267064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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