Coincident observations of lightning by the FORTE photodiode detector, the New Mexico Tech Lightning Mapping Array and the NLDN during STEPS

2004 ◽  
Vol 31 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Cynthia M. M. Noble ◽  
William H. Beasley ◽  
Susan E. Postawko ◽  
T. E. L. Light
Keyword(s):  
New Mexico ◽  
Mapping Array ◽  
Mexico Tech

Graduate programs at New Mexico Tech

BIOS ◽  
2021 ◽  
Vol 91 (4) ◽  
Author(s):  
Linda DeVeaux
Keyword(s):  
New Mexico ◽  
Graduate Programs ◽  
Mexico Tech

scholarly journals New Mexico Tech landmine, UXO, IED detection sensor test facility: measurements in real field soils

2006 ◽  
Author(s):  
Jan M. H. Hendrickx ◽  
Nicole Alkov ◽  
Sung-ho Hong ◽  
Remke L. Van Dam ◽  
Jan Kleissl ◽  
...  
Keyword(s):  
New Mexico ◽  
Test Facility ◽  
Real Field ◽  
Field Soils ◽  
Mexico Tech

The 29 June 2000 Supercell Observed during STEPS. Part II: Lightning and Charge Structure

2005 ◽  
Vol 62 (12) ◽  
pp. 4151-4177 ◽  
Author(s):  
Kyle C. Wiens ◽  
Steven A. Rutledge ◽  
Sarah A. Tessendorf
Keyword(s):  
Positive Charge ◽  
Lightning Activity ◽  
Structure Evolution ◽  
Severe Thunderstorm ◽  
Charge Structure ◽  
Flash Rate ◽  
Lightning Detection ◽  
Mapping Array ◽  
Total Lightning ◽  
Mexico Tech

Abstract This second part of a two-part study examines the lightning and charge structure evolution of the 29 June 2000 tornadic supercell observed during the Severe Thunderstorm Electrification and Precipitation Study (STEPS). Data from the National Lightning Detection Network and the New Mexico Tech Lightning Mapping Array (LMA) are used to quantify the total and cloud-to-ground (CG) flash rates. Additionally, the LMA data are used to infer gross charge structure and to determine the origin locations and charge regions involved in the CG flashes. The total flash rate reached nearly 300 min−1 and was well correlated with radar-inferred updraft and graupel echo volumes. Intracloud flashes accounted for 95%–100% of the total lightning activity during any given minute. Nearly 90% of the CG flashes delivered a positive charge to ground (+CGs). The charge structure during the first 20 min of this storm consisted of a midlevel negative charge overlying lower positive charge with no evidence of an upper positive charge. The charge structure in the later (severe) phase was more complex but maintained what could be roughly described as an inverted tripole, dominated by a deep midlevel (5–9 km MSL) region of positive charge. The storm produced only two CG flashes (both positive) in the first 2 h of lightning activity, both of which occurred during a brief surge in updraft and hail production. Frequent +CG flashes began nearly coincident with dramatic increases in storm updraft, hail production, total flash rate, and the formation of an F1 tornado. The +CG flashes tended to cluster in or just downwind of the heaviest precipitation, which usually contained hail. The +CG flashes all originated between 5 and 9 km MSL, centered at 6.8 km (−10°C), and tapped LMA-inferred positive charge both in the precipitation core and (more often) in weaker reflectivity extending downwind. All but one of the −CG flashes originated from >9 km MSL and tended to strike near the precipitation core.

NEW MEXICO TECH WRITING PROGRAM AND WRITING CENTER

2017 ◽  
pp. 434-450
Author(s):  
Maggie Griffin Taylor ◽  
Julianne Newmark ◽  
Steve Simpson
Keyword(s):  
New Mexico ◽  
Writing Center ◽  
Writing Program ◽  
Mexico Tech

Advanced microelectronics test facility at New Mexico tech

2006 ◽  
Author(s):  
S.M. Bracht ◽  
S.W. Teare ◽  
J.L. Meason ◽  
L.O. Quarrie
Keyword(s):  
New Mexico ◽  
Test Facility ◽  
Mexico Tech

scholarly journals An automated local and regional seismic event detection and location system using waveform correlation

1999 ◽  
Vol 89 (3) ◽  
pp. 657-669 ◽  
Author(s):  
Mitchell Withers ◽  
Richard Aster ◽  
Christopher Young
Keyword(s):  
New Mexico ◽  
Event Detection ◽  
Detection System ◽  
Grid Point ◽  
Matrix Multiplication ◽  
Phase Identification ◽  
Time Step ◽  
Location System ◽  
Ctbt Monitoring ◽  
Mexico Tech

Abstract We report on the development of an automated Local Waveform Correlation Event Detection System (LWCEDS) and its application to the New Mexico Tech Seismic Network. LWCEDS is an adaptation of a global system, WCEDS, a matched filtering algorithm for global Comprehensive Test Ban Treaty (CTBT) monitoring applications developed at Sandia National Laboratories and New Mexico Tech. Although the current CTBT monitoring system is based on teleseismic phase detection, effort is being placed on research to highlight specific areas of the globe for which local and regional seismic networks could be employed. An automated waveform correlation regional location system could also serve as a rapid alert and automated location system by providing magnitude and hypocenter information within a few minutes of the occurrence of a hazardous earthquake. In the LWCEDS algorithm, processed waveforms are correlated with theoretical travel-time envelopes, and a grid search is performed to identify the space-time solutions that yield the highest correlations. High correlation indicates that an event has occurred and that a good approximation to the correct origin time and hypocenter has been determined; explicit phase identification is not required. To avoid the large computational expense of calculating a complete correlation for each grid point, we use a laterally homogeneous velocity model and reformulate the problem into a single matrix multiplication and matrix assessment for each time step. LWCEDS has been successfully tested on a suite of local and regional seismic events selected to span the range of expected event quality. Preliminary results from our sparse network show typical epicentral errors of less than 3 km for local events and, with notable exceptions, to within 10 to 20 km for regional events. Similar results were obtained during an on-line experiment conducted to generate daily bulletins during the time period from 3 December 1996 through 7 January 1997. Data from 156 triggers were processed, including 33 teleseisms, 102 regional events (includes explosions), and 21 local earthquakes. Results from this expanded test set are encouraging but reveal the need for a method to mask or flag various electronic and telemetry spikes.

Engineering Programs and Research at New Mexico Tech

JOM ◽  
1986 ◽  
Vol 38 (2) ◽  
pp. 40-40
Author(s):  
G. Purcell
Keyword(s):  
New Mexico ◽  
Engineering Programs ◽  
Mexico Tech
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