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- A Holistic Approach to Understanding Asteroids: Laboratory Experiments, Theoretical Models, & Radar Observations 11 Sep, 2020
- Sharing the Connection: Arecibo’s Planetary Radar & NASA’s OSIRIS-REx Mission to Bennu10 Sep, 2020
- Analyzing Gravitational Fields Around Small Bodies in Support of Future Spacecraft Missions09 Sep, 2020
- Broken Cable Damages Arecibo Observatory11 Aug, 2020
- Open Position: Research Intern06 Aug, 2020
- Recorded Session: Arecibo Observatory Virtual Town Hall30 Jul, 2020
- The Arecibo Observatory congratulates Dr. Martha P. Haynes, recipient of the Janksy Lectureship 2020! 23 Jul, 2020
- AO Adapts: Continued Workshops, Training, and Education06 Jul, 2020
- Annoucing the Arecibo Observatory Town Hall01 Jul, 2020
- AO Features: Former AO Postdoctoral Researcher Kristen Jones30 Jun, 2020
- New AO Lidar Observations of Ca+ in the Mesosphere and Thermosphere29 Jun, 2020
- Breaking Assumptions on the Excitation Temperatures in Molecular Clouds29 Jun, 2020
- Modifying the Earth’s Ionosphere from Arecibo29 Jun, 2020
- AO radar measurements of Jupiter’s Moons29 Jun, 2020
- A New Approach for Understanding the Occurrence Rate of MSTIDs in the Caribbean Nighttime Ionosphere29 Jun, 2020
Byadmin31 March 2020 Astronomy
|Astronomy||Arecibo Observatory re-enters VLBI network with 21st-century backend|
Arecibo Observatory (AO), with its recently upgraded Very Long Baseline Interferometer (VLBI) backend, successfully detected fringes in concert with antennae in the European VLBI Network (EVN).
“The impact of AO on VLBI is nothing short of huge. Having AO back into a VLBI array enables unique VLBI science, including spectral line sensitivity and Fast Radio Burst (FRB) detection and localization, solely because of its huge collecting area. The detection and localization of FRBs is truly a novel technique for the VLBI,” explain Harro Verkouter, interim Head Technical Operations and R&D of the Joint Institute for VLBI ERIC (JIVE).
The upgraded system at AO consists of three key pieces of equipment, consisting of hard- and software, that need to work together to successfully participate in a VLBI observation: a FieldSystem, a dual Roach Digital Back End digital (RDBE) receiver and a 64 GB RAM Mark6 recorder. The system can process 512 MHz bandwidth both in PFB (Polyphase filter Bank) and DDC (Direct digital conversion) modes of operation, supports 4096 Mbps recording speed, and has 32 TB of disk capacity and also supports data e-shipping to the EVN software correlator at JIVE .
Mr. Verkouter visited Arecibo last year to modify, develop, and install new software to handle the AO integration and was glad to be on-site to assist with the reconfiguration of the equipment that simplifies the system. He was invited by Dr. Kristen Jones, former AO postdoctoral researcher under the Preeminent Postdoctoral Scholar program at UCF, in support of VLBI observations.
“The new system allows AO to follow new developments in VLBI technology once more, and increase their contribution to VLBI arrays by at least a factor of two,” Verkouter explained. “AO can now capture more data from astronomical sources. Especially in the global VLBI, where the EVN and VLBA jointly observe, the extremely sensitive baselines to the AO are fundamental for faint source detection and accurate phase calibration across the combined network.”
Congratulations to the team who worked on the upgrade project, which includes L. Quintero, A. Venkataraman from AO, H. Verkouter from JIVE, with significant support from U. Bach, B. Campbell, A. Szomoru from JIVE, H. B. Frej, M. Luce, J. Blanchard, W. Brisken from NRAO (National Radio Astronomy Observatory). The AO scientific staff who tested and commissioned the system include post-doctoral fellows S. Vaddi, (former) K. Jones, observations associate A. McGilvray, (former) VLBI scientist T. Ghosh and AO Emeritus astronomer C. J. Salter
Article written by Dr. Tracy Becker - AO Collaborator / SwRI Research Scientist
Head of the Astronomy Dept.
Keywords: arecibo, observatory,vlbi, Roach, Digital, Back, End, digital, receiver, Quintero, Venkataraman, Verkouter, JIVE, Bach, Campbell, Szomoru, Frej, Luce, Blanchard, Brisken, Very, Long, Baseline, Interferometer