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24 results on '"Smith, Suzanne W."'

1. Development of Community, Capabilities, and Understanding through Unmanned Aircraft-Based Atmospheric Research : The LAPSE-RATE Campaign

Author

de Boer, Gijs, Diehl, Constantin, Jacob, Jamey, Houston, Adam, Smith, Suzanne W., Chilson, Phillip, Schmale, David G., Intrieri, Janet, Pinto, James, Elston, Jack, Brus, David, Kemppinen, Osku, Clark, Alex, Lawrence, Dale, Bailey, Sean C. C., Sama, Michael P., Frazier, Amy, Crick, Christopher, Natalie, Victoria, Pillar-Little, Elizabeth, Klein, Petra, Waugh, Sean, Lundquist, Julie K., Barbieri, Lindsay, Kral, Stephan T., Jensen, Anders A., Dixon, Cory, Borenstein, Steven, Hesselius, Daniel, Human, Kathleen, Hall, Philip, Argrow, Brian, Thornberry, Troy, Wright, Randy, and Kelly, Jason T.

Published
2020

2. Assimilation of a Coordinated Fleet of Uncrewed Aircraft System Observations in Complex Terrain: Observing System Experiments

Author

Jensen, Anders A., primary, Pinto, James O., additional, Bailey, Sean C. C., additional, Sobash, Ryan A., additional, Romine, Glen, additional, Boer, Gijs de, additional, Houston, Adam L., additional, Smith, Suzanne W., additional, Lawrence, Dale A., additional, Dixon, Cory, additional, Lundquist, Julie K., additional, Jacob, Jamey D., additional, Elston, Jack, additional, Waugh, Sean, additional, Brus, David, additional, and Steiner, Matthias, additional

Published
2022
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4. Assimilation of a Coordinated Fleet of Uncrewed Aircraft System Observations in Complex Terrain: EnKF System Design and Preliminary Assessment

Author

Jensen, Anders A., primary, Pinto, James O., additional, Bailey, Sean C. C., additional, Sobash, Ryan A., additional, de Boer, Gijs, additional, Houston, Adam L., additional, Chilson, Phillip B., additional, Bell, Tyler, additional, Romine, Glen, additional, Smith, Suzanne W., additional, Lawrence, Dale A., additional, Dixon, Cory, additional, Lundquist, Julie K., additional, Jacob, Jamey D., additional, Elston, Jack, additional, Waugh, Sean, additional, and Steiner, Matthias, additional

Published
2021
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5. Data generated during the 2018 LAPSE-RATE campaign: an introduction and overview

Author

de Boer, Gijs, primary, Houston, Adam, additional, Jacob, Jamey, additional, Chilson, Phillip B., additional, Smith, Suzanne W., additional, Argrow, Brian, additional, Lawrence, Dale, additional, Elston, Jack, additional, Brus, David, additional, Kemppinen, Osku, additional, Klein, Petra, additional, Lundquist, Julie K., additional, Waugh, Sean, additional, Bailey, Sean C. C., additional, Frazier, Amy, additional, Sama, Michael P., additional, Crick, Christopher, additional, Schmale III, David, additional, Pinto, James, additional, Pillar-Little, Elizabeth A., additional, Natalie, Victoria, additional, and Jensen, Anders, additional

Published
2020
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6. Intercomparison of Small Unmanned Aircraft System (sUAS) Measurements for Atmospheric Science during the LAPSE-RATE Campaign

Author

Barbieri, Lindsay, Kral, Stephan T., Bailey, Sean C. C., Frazier, Amy E., Jacob, Jamey D., Reuder, Joachim, Brus, David, Chilson, Phillip B., Crick, Christopher, Detweiler, Carrick, Doddi, Abhiram, Elston, Jack, Foroutan, Hosein, González-Rocha, Javier, Greene, Brian R., Guzman, Marcelo I., Houston, Adam L., Islam, Ashraful, Kemppinen, Osku, Lawrence, Dale, Pillar-Little, Elizabeth A., Ross, Shane D., Sama, Michael P., Schmale, David G. III, Schuyler, Travis J., Shankar, Ajay, Smith, Suzanne W., Waugh, Sean, Dixon, Cory, Borenstein, Steve, de Boer, Gijs, Barbieri, Lindsay, Kral, Stephan T., Bailey, Sean C. C., Frazier, Amy E., Jacob, Jamey D., Reuder, Joachim, Brus, David, Chilson, Phillip B., Crick, Christopher, Detweiler, Carrick, Doddi, Abhiram, Elston, Jack, Foroutan, Hosein, González-Rocha, Javier, Greene, Brian R., Guzman, Marcelo I., Houston, Adam L., Islam, Ashraful, Kemppinen, Osku, Lawrence, Dale, Pillar-Little, Elizabeth A., Ross, Shane D., Sama, Michael P., Schmale, David G. III, Schuyler, Travis J., Shankar, Ajay, Smith, Suzanne W., Waugh, Sean, Dixon, Cory, Borenstein, Steve, and de Boer, Gijs

Abstract

Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of the development and application of these systems, improving knowledge of best practices for accurate measurement is critical for achieving scientific goals. We present results from an intercomparison of atmospheric measurement data from the Lower Atmospheric Process Studies at Elevation—a Remotely piloted Aircraft Team Experiment (LAPSE-RATE) field campaign. We evaluate a total of 38 individual sUAS with 23 unique sensor and platform configurations using a meteorological tower for reference measurements. We assess precision, bias, and time response of sUAS measurements of temperature, humidity, pressure, wind speed, and wind direction. Most sUAS measurements show broad agreement with the reference, particularly temperature and wind speed, with mean value differences of 1.6 ± 2.6 ∘ emantics> C and 0.22 ± 0.59 emantics> m/s for all sUAS, respectively. sUAS platform and sensor configurations were found to contribute significantly to measurement accuracy. Sensor configurations, which included proper aspiration and radiation shielding of sensors, were found to provide the most accurate thermodynamic measurements (temperature and relative humidity), whereas sonic anemometers on multirotor platforms provided the most accurate wind measurements (horizontal speed and direction). We contribute both a characterization and assessment of sUAS for measuring atmospheric parameters, and identify important challenges and opportunities for improving scientific measurements with sUAS.

Published
2019
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7. Intercomparison of Small Unmanned Aircraft System (sUAS) Measurements for Atmospheric Science during the LAPSE-RATE Campaign

Author

Civil and Environmental Engineering, Aerospace and Ocean Engineering, Biomedical Engineering and Mechanics, School of Plant and Environmental Sciences, Barbieri, Lindsay, Kral, Stephan T., Bailey, Sean C. C., Frazier, Amy E., Jacob, Jamey D., Reuder, Joachim, Brus, David, Chilson, Phillip B., Crick, Christopher, Detweiler, Carrick, Doddi, Abhiram, Elston, Jack, Foroutan, Hosein, González-Rocha, Javier, Greene, Brian R., Guzman, Marcelo I., Houston, Adam L., Islam, Ashraful, Kemppinen, Osku, Lawrence, Dale, Pillar-Little, Elizabeth A., Ross, Shane D., Sama, Michael P., Schmale, David G. III, Schuyler, Travis J., Shankar, Ajay, Smith, Suzanne W., Waugh, Sean, Dixon, Cory, Borenstein, Steve, de Boer, Gijs, Civil and Environmental Engineering, Aerospace and Ocean Engineering, Biomedical Engineering and Mechanics, School of Plant and Environmental Sciences, Barbieri, Lindsay, Kral, Stephan T., Bailey, Sean C. C., Frazier, Amy E., Jacob, Jamey D., Reuder, Joachim, Brus, David, Chilson, Phillip B., Crick, Christopher, Detweiler, Carrick, Doddi, Abhiram, Elston, Jack, Foroutan, Hosein, González-Rocha, Javier, Greene, Brian R., Guzman, Marcelo I., Houston, Adam L., Islam, Ashraful, Kemppinen, Osku, Lawrence, Dale, Pillar-Little, Elizabeth A., Ross, Shane D., Sama, Michael P., Schmale, David G. III, Schuyler, Travis J., Shankar, Ajay, Smith, Suzanne W., Waugh, Sean, Dixon, Cory, Borenstein, Steve, and de Boer, Gijs

Abstract

Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of the development and application of these systems, improving knowledge of best practices for accurate measurement is critical for achieving scientific goals. We present results from an intercomparison of atmospheric measurement data from the Lower Atmospheric Process Studies at Elevation—a Remotely piloted Aircraft Team Experiment (LAPSE-RATE) field campaign. We evaluate a total of 38 individual sUAS with 23 unique sensor and platform configurations using a meteorological tower for reference measurements. We assess precision, bias, and time response of sUAS measurements of temperature, humidity, pressure, wind speed, and wind direction. Most sUAS measurements show broad agreement with the reference, particularly temperature and wind speed, with mean value differences of 1.6 ± 2.6 ∘ emantics> C and 0.22 ± 0.59 emantics> m/s for all sUAS, respectively. sUAS platform and sensor configurations were found to contribute significantly to measurement accuracy. Sensor configurations, which included proper aspiration and radiation shielding of sensors, were found to provide the most accurate thermodynamic measurements (temperature and relative humidity), whereas sonic anemometers on multirotor platforms provided the most accurate wind measurements (horizontal speed and direction). We contribute both a characterization and assessment of sUAS for measuring atmospheric parameters, and identify important challenges and opportunities for improving scientific measurements with sUAS.

Published
2019

8. Iterative use of direct matrix updates - Connectivity and convergence

Author

Smith, Suzanne W

Subjects
Structural Mechanics
Abstract

In this paper, optimal matrix adjustment was examined with a focus on connectivity and its preservation. To accomplish this, techniques which do not preserve the sparsity pattern were applied in an iterative approach that forces the preservation of the zero/nonzero pattern of the original stiffness matrix. This approach showed impressive results for locating damaged truss members. In addition, this approach also provides understanding of optimal updates in general.

Published
1992

9. Underlying modal data issues for detecting damage in truss structures

Author

Kashangaki, Thomas A.-L, Smith, Suzanne W, and Lim, Tae W

Subjects
Spacecraft Design, Testing And Performance
Abstract

The modal strain energy distribution and frequency and mode shape sensitivities to structural stiffness changes are studied in order to overcome the current limits of modal data limit measurements in damage location. It is established that damage detection is feasible for members significantly contributing to the strain energy of the measured modes; the modes that are most effective in detecting the damage of critical members are identifiable, and a relationship is formulated between the accuracy of the measured modes and frequencies and the probability of damage detection.

Published
1992

10. Experiments for locating damaged truss members in a truss structure

Author

Mcgowan, Paul E, Smith, Suzanne W, and Javeed, Mehzad

Subjects
Structural Mechanics
Abstract

Locating damaged truss members in large space structures will involve a combination of sensing and diagnostic techniques. Methods developed for damage location require experimental verification prior to on-orbit applications. To this end, a series of experiments for locating damaged members using a generic, ten bay truss structure were conducted. A 'damaged' member is a member which has been removed entirely. Previously developed identification methods are used in conjunction with the experimental data to locate damage. Preliminary results to date are included, and indicate that mode selection and sensor location are important issues for location performance. A number of experimental data sets representing various damage configurations were compiled using the ten bay truss. The experimental data and the corresponding finite element analysis models are available to researchers for verification of various methods of structure identification and damage location.

Published
1991

24. Intercomparison of Small Unmanned Aircraft System (sUAS) Measurements for Atmospheric Science during the LAPSE-RATE Campaign.

Author

Barbieri L, Kral ST, Bailey SCC, Frazier AE, Jacob JD, Reuder J, Brus D, Chilson PB, Crick C, Detweiler C, Doddi A, Elston J, Foroutan H, González-Rocha J, Greene BR, Guzman MI, Islam ALHA, Kemppinen O, Lawrence D, Pillar-Little EA, Ross SD, Sama M, Schmale DG III, Schuyler TJ, Shankar A, Smith SW, Waugh S, Dixon C, Borenstein S, and Boer G

Abstract

Small unmanned aircraft systems (sUAS) are rapidly transforming atmospheric research. With the advancement of the development and application of these systems, improving knowledge of best practices for accurate measurement is critical for achieving scientific goals. We present results from an intercomparison of atmospheric measurement data from the Lower Atmospheric Process Studies at Elevation-a Remotely piloted Aircraft Team Experiment (LAPSE-RATE) field campaign. We evaluate a total of 38 individual sUAS with 23 unique sensor and platform configurations using a meteorological tower for reference measurements. We assess precision, bias, and time response of sUAS measurements of temperature, humidity, pressure, wind speed, and wind direction. Most sUAS measurements show broad agreement with the reference, particularly temperature and wind speed, with mean value differences of 1.6 ± 2 . 6 ∘ C and 0.22 ± 0 . 59 m/s for all sUAS, respectively. sUAS platform and sensor configurations were found to contribute significantly to measurement accuracy. Sensor configurations, which included proper aspiration and radiation shielding of sensors, were found to provide the most accurate thermodynamic measurements (temperature and relative humidity), whereas sonic anemometers on multirotor platforms provided the most accurate wind measurements (horizontal speed and direction). We contribute both a characterization and assessment of sUAS for measuring atmospheric parameters, and identify important challenges and opportunities for improving scientific measurements with sUAS.

Published
2019
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