Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Nick Waltham"'
Autor:
Craig DeForest, Ronnie Killough, Sarah Gibson, Alan Henry, Traci Case, Matthew Beasley, Glenn Laurent, Robin Colaninno, Nick Waltham
Publikováno v:
2022 IEEE Aerospace Conference (AERO).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0485a2ad5d6bf557fbaa6ab50493d7ce
https://doi.org/10.1109/aero53065.2022.9843340
https://doi.org/10.1109/aero53065.2022.9843340
Single-photon avalanche diode (SPAD) arrays are solid-state detectors that offer imaging capabilities at the level of individual photons. Very recently, time-gated cameras based on solid-state CMOS SPAD technology have been proposed for improving the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32e9c1e25e5ab3bbef32b12510be58d8
https://doi.org/10.5194/egusphere-egu2020-21809
https://doi.org/10.5194/egusphere-egu2020-21809
Autor:
Kevin Middleton, Robert Hardie, Jackie A. Davies, Emmanuel Mazy, Volker Kirschner, J Hinrichs, Ian Tosh, Philipp Huke, Lars Stopfkuchen, Chris J. Eyles, Thomas McCarron, Nick Waltham, Klaus Ergenzinger, Marie-Laure Hellin, Heiko Anwand, Volker Bothmer, Matthew J. West, Bogdan Nicula, S. James Tappin, Piers Jiggens, Andrew Earle
Publikováno v:
International Conference on Space Optics — ICSO 2018.
Accurate prediction of the arrival of solar wind phenomena, in particular coronal mass ejections (CMEs), is becoming more important given our ever-increasing reliance on technology. SCOPE is a coronagraph specifically optimised for operational space
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d982e4dfb4b225c139939448a497d9a
https://doi.org/10.1117/12.2536037
https://doi.org/10.1117/12.2536037
Autor:
Nick Waltham, David Rivas-Marchena, Matthew Clapp, Thomas Gardiner, L. Jones, Steven Bell, Quentin Morrissey
Publikováno v:
2018 IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC).
This paper discusses a compressed-ROM 600MSPS dual-branch Direct Digital Synthesizer (DDS) providing sinewaves of 80dBc. It supports positive chirp slopes up to 40MHz/s with ~1.3kHz/s resolution. The amplitude can be shaped with Gaussian envelopes of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35166f270c8b224a4fa2a025a407cd96
https://doi.org/10.1109/nssmic.2018.8824523
https://doi.org/10.1109/nssmic.2018.8824523
Autor:
Ionut Mihalcea, Nick Waltham, Matthew Clapp, James King, Chris Hayes-Thakore, Tom Morse, Mike Salter
Publikováno v:
SPIE Proceedings.
World Space Observatory Ultraviolet (WSO-UV) is a major Russian-led international collaboration to develop a large space-borne 1.7 m Ritchey-Chretien telescope and instrumentation to study the universe at ultraviolet wavelengths between 115 nm and 32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbc1b5c64d34d2adcfadad368e2ebd7c
https://doi.org/10.1117/12.2231289
https://doi.org/10.1117/12.2231289
Autor:
Anthony Bourdelle, Jackie A. Davies, Nick Waltham, J. Kevin Rogers, Ian Tosh, Tony Richards, S. James Tappin, C. J. Eyles, Richard A. Harrison, Doug Griffin, Kevin Middleton
Publikováno v:
SPIE Proceedings.
RAL Space is enhancing its program to lead the development of European capabilities in space-based visible-light coronal and heliospheric imaging instrumentation in the light of emerging opportunities such as the European Space Agency’s Space Situa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34bbf1a6a4cb6689b513ddccb423ca60
https://doi.org/10.1117/12.2186996
https://doi.org/10.1117/12.2186996
In-orbit verification, calibration, and performance of the Heliospheric Imager on the STEREO mission
Autor:
Emmanuel Mazy, D. Moses, Simon Plunkett, Jean-Marc Defise, R. G. Harrison, C. J. Eyles, Christopher C. Davis, Russell A. Howard, Nick Waltham, Jean-Philippe Halain, Jeff Newmark
Publikováno v:
SPIE Proceedings.
The Heliospheric Imager (HI) forms part of the SECCHI suite of instruments aboard the two NASA STEREO spacecraft which were launched successfully from Cape Canaveral AFB on 25 Oct 2006 (26 Oct UTC). Following lunar swingby’s on 15 Dec and 21 Jan re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c1b2f090bbcc39479531090499845b
https://doi.org/10.1117/12.732822
https://doi.org/10.1117/12.732822
Autor:
Nick Waltham, C. J. Eyles
Publikováno v:
SPIE Proceedings.
We report the design, development and performance of the SECCHI (Sun Earth Connection Coronal and Heliospheric Investigation) CCD camera electronics on NASA's Solar Terrestrial Relations Observatory (STEREO). STEREO consists of two nearly identical s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46c3f8a7e92c6886cab49ab4849e3b7c
https://doi.org/10.1117/12.733835
https://doi.org/10.1117/12.733835
Publikováno v:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XV.
This paper evaluates the performance of a low noise, high throughput readout system for X-ray Charge Coupled Devices (CCDs). High pixel throughput (>0.5M pixels per second) can be achieved by two methods that are not mutually exclusive. Firstly, sect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f73899e076be7efe4ca3006ba9b9217
https://doi.org/10.1117/12.747969
https://doi.org/10.1117/12.747969
Autor:
S. J. Tappin, P. P. Hick, D. Sinclair, J. B. Mozer, Andrew Buffington, M. P. Cooke, David F. Webb, Bernard V. Jackson, G. M. Simnett, P. E. Holladay, Nick Waltham, C. J. Eyles, Stephan D. Price, J. C. Johnston, T. A. Kuchar, Donald R. Mizuno, Richard R. Radick
Publikováno v:
Geophysical Research Letters. 31
[1] We present the first clear observations of an Earth-directed interplanetary disturbance tracked by the Solar Mass Ejection Imager (SMEI). We find that this event can be related to two halo CMEs seen at the Sun about 2 days earlier, and which merg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7403d3ff2a95158e7cd1e1784eaec06e
https://doi.org/10.1029/2003gl018766
https://doi.org/10.1029/2003gl018766