Derek Kubo
YOU?
Author Swipe
View article: First Frequency Phase Transfer from the 3 mm to the 1 mm Band on an Earth-sized Baseline
First Frequency Phase Transfer from the 3 mm to the 1 mm Band on an Earth-sized Baseline Open
Frequency phase transfer (FPT) is a technique designed to increase coherence and sensitivity in radio interferometry by making use of the nondispersive nature of the troposphere to calibrate high-frequency data using solutions derived at a…
View article: First frequency phase transfer from the 3 mm to the 1 mm band on an Earth-sized baseline
First frequency phase transfer from the 3 mm to the 1 mm band on an Earth-sized baseline Open
Frequency Phase Transfer (FPT) is a technique designed to increase coherence and sensitivity in radio interferometry by making use of the non-dispersive nature of the troposphere to calibrate high-frequency data using solutions derived at …
View article: Absolute Flux Density Calibration of the Greenland Telescope Data for Event Horizon Telescope Observations
Absolute Flux Density Calibration of the Greenland Telescope Data for Event Horizon Telescope Observations Open
Starting from the observing campaign in April 2018, the Greenland Telescope (GLT) has been added as a new station of the Event Horizon Telescope (EHT) array. Visibilities on baselines to the GLT, particularly in the North-South direction, …
View article: The Greenland Telescope: Construction, Commissioning, and Operations in Pituffik
The Greenland Telescope: Construction, Commissioning, and Operations in Pituffik Open
In 2018, the Greenland Telescope (GLT) started scientific observation in Greenland. Since then, we have completed several significant improvements and added new capabilities to the telescope system. This paper presents a full review of the…
View article: A ring-like accretion structure in M87 connecting its black hole and jet
A ring-like accretion structure in M87 connecting its black hole and jet Open
The nearby radio galaxy M87 is a prime target for studying black hole accretion and jet formation 1,2 . Event Horizon Telescope observations of M87 in 2017, at a wavelength of 1.3 mm, revealed a ring-like structure, which was interpreted a…
View article: BURSTT: Bustling Universe Radio Survey Telescope in Taiwan
BURSTT: Bustling Universe Radio Survey Telescope in Taiwan Open
Fast Radio Bursts (FRBs) are bright millisecond-duration radio transients that appear about 1000 times per day, all-sky, for a fluence threshold 5 Jy ms at 600 MHz. The FRB radio-emission physics and the compact objects involved in these e…
View article: BURSTT: Bustling Universe Radio Survey Telescope in Taiwan
BURSTT: Bustling Universe Radio Survey Telescope in Taiwan Open
Fast Radio Bursts (FRBs) are bright millisecond-duration radio transients that appear about 1,000 times per day, all-sky, for a fluence threshold 5 Jy ms at 600 MHz. The FRB radio-emission physics and the compact objects involved in these …
View article: Commissioning of Namakanui on the JCMT
Commissioning of Namakanui on the JCMT Open
Namakanui is an instrument containing three inserts in an ALMA type Dewar. The three inserts are Alaihi, Uu and Aweoweo operating around 86, 230 and 345GHz. The receiver is being commissioned on the JCMT. It will be used for both Single di…
View article: Electronics Instrumentation for the Greenland Telescope
Electronics Instrumentation for the Greenland Telescope Open
The Greenland Telescope project has recently participated in an experiment to image the supermassive black hole shadow at the center of M87 using Very Long Baseline Interferometry technique in April of 2018. The antenna consists of the 12-…
View article: A Low-cost 4 Bit, 10 Giga-samples-per-second Analog-to-digital Converter Printed Circuit Board Assembly for FPGA-based Backends
A Low-cost 4 Bit, 10 Giga-samples-per-second Analog-to-digital Converter Printed Circuit Board Assembly for FPGA-based Backends Open
In this study, a 4 bit, 10 giga-samples-per-second analog-to-digital converter (ADC) printed circuit board assembly (PCBA) was designed, manufactured, and characterized for digitizing radio telescopes. For this purpose, an Adsantec ANST712…
View article: Development of digital sideband separating down-conversion for Yuan-Tseh Lee Array
Development of digital sideband separating down-conversion for Yuan-Tseh Lee Array Open
This report presents a down-conversion method involving digital sideband\nseparation for the Yuan Tseh Lee Array to double the processing bandwidth. The\nreceiver consists of a MMIC HEMT LNA frontend operating at a wavelength of 3\nmm, and…