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Your search keyword '"Simmonds, J. J."' showing total 8 results
Start Over Author "Simmonds, J. J." Publication Type Reports
8 results on '"Simmonds, J. J."'

1. Mars Hand Lens Imager (MAHLI) efforts and observations at the “Rocknest' Eolian sand shadow in Curiosity’s Gale Crater field site

Author

Harker, D. E, Herkenhoff, K. E, Herrera, P. N, Hurowitz, J. A, Jandura, L, Krezoski, G. M, Lewis, K. W, Madsen, M. B, Maki, J. N, Malin, M. C, Ming, D. W, Nixon, B. E, Olson, T. S, Pariser, O, Posiolova, L. V, Ravine, M. A, Robinson, M. L, Roumeliotis, C, Rowland, S. K, Rubin, D. M, Ruoff, N. A, Seybold, C. C, Schieber, J, Schmidt, M. E, Sengstacken, A. J, Simmonds, J. J, Sullivan, R. J, Tompkins, V. V, Van Beek, T. L, Edgett, K. S, Yingst, R. A, Minitti, M. E, Goetz, W, Kah, L. C, Kennedy, M. R, Lipkaman, L. J, Jensen, E. H, Anderson, R. C, Beegle, L. W, Carsten, J. L, Cooper, B, Deen, R. G, Dromart, G, Eigenbrode, J. L, Grotzinger, J. P, Grupta, S, Hamilton, V. E, and Hardgrove, C. J

Abstract

The Mars Science Laboratory (MSL) mission is focused on assessing the past or present habitability of Mars, through interrogation of environment and environmental records at the Curiosity rover field site in Gale crater. The MSL team has two methods available to collect, process and deliver samples to onboard analytical laboratories, the Chemistry and Mineralogy instrument (CheMin) and the Sample Analysis at Mars (SAM) instrument suite. One approach obtains samples by drilling into a rock, the other uses a scoop to collect loose regolith fines.

Published
2013

2. Mars Hand Lens Imager (MAHLI) efforts and observations at the “Rocknest' Eolian sand shadow in Curiosity’s Gale Crater field site

Author

Edgett, K. S, Yingst, R. A, Minitti, M. E, Goetz, W, Kah, L. C, Kennedy, M. R, Lipkaman, L. J, Jensen, E. H, Anderson, R. C, Beegle, L. W, Carsten, J. L, Cooper, B, Deen, R. G, Dromart, G, Eigenbrode, J. L, Grotzinger, J. P, Grupta, S, Hamilton, V. E, Hardgrove, C. J, Harker, D. E, Herkenhoff, K. E, Herrera, P. N, Hurowitz, J. A, Jandura, L, Krezoski, G. M, Lewis, K. W, Madsen, M. B, Maki, J. N, Malin, M. C, Ming, D. W, Nixon, B. E, Olson, T. S, Pariser, O, Posiolova, L. V, Ravine, M. A, Robinson, M. L, Roumeliotis, C, Rowland, S. K, Rubin, D. M, Ruoff, N. A, Seybold, C. C, Schieber, J, Schmidt, M. E, Sengstacken, A. J, Simmonds, J. J, Sullivan, R. J, Tompkins, V. V, and Van Beek, T. L

Published
2013

3. Curiosity's Mars Hand Lens Imager (MAHLI) : inital observations and activities.

Author

Edgett, K. S, Yingst, R. A, Minitti, M. E, Robinson, M. L, Kennedy, M. R, Lipkaman, L. J, Jensen, E. H, Anderson, R. C, Bean, K. M, Beegle, L. W, Carsten, J. L, Collins, C. L, Cooper, B, Deen, R. G, Eigenbrode, J. L, Goetz, W, Grotzinger, J. P, Gupta, S, Hamilton, V. E, Hardgrove, C. J, Harker, D. E, Herkenhoff, K. E, Herrera, P. N, Jandura, L, Kah, L. C, Krezoski, G. M, Leger, P. C, Lemmom, M. T, Lewis, K. W, Madsen, M. B, Maki, J. N, Maln, M. C, Nixon, B. E, Olson, T. S, Pariser, O, Posiolova, L. V, Ravine, M. A, Roumeliotis, C, Rowland, S. K, Ruoff, N. A, Seybold, C. C, Schieber, J, Schmidt, M. E, Sengstacken, A. J, Simmonds, J. J, Stack, K. M, Sullivan, R. J, Tompkins, V. V, and Van Beek, T. L

Published
2013

4. An assessment of the issues and concerns associated with the analysis of ice-bearing samples by the 2009 Mars science laboratory

Author

Lyons, P. R, Zent, A. P, Steele, A, Spray, J. G, Simmonds, J. J, Rothschild, L, Righter, K, Polland, W, Papanastassiou, D. A, Mellon, M, McNamara, K, Mahaffy, B, Huntsberger, T. L, Henninger, R. J, Hargreaves, G, Fisher, D, Daly, M, Conrad, P. G, Carsey, F. D, Bruno, R. J, Black, P. B, Bearman, G. H, Bada, J. L, Miller, S, and Beaty, D. W

Abstract

UNKNOWN

Published
2003

7. Infrared and visible detector electronics for the Infrared Astronomical Satellite (IRAS)

Author

Langford, D. L, Simmonds, J. J, Ozawa, T, Long, E. C, and Paris, R

Subjects
Spacecraft Instrumentation
Abstract

The paper describes the detectors, preamplifiers, and processing electronics; the system characterization test methods and results; and the performance of the detectors and electronics during the first month of on-orbit operation of the IRAS telescope. The Focal Plane Array (FPA) consists of 62 IR channels and 8 visible channels operating at 2.5 K. The IR detectors are grouped in eight 7 or 8 channel staggered linear subarrays with shared bias voltage; the visible detectors are grouped in two 4 channel skewed arrays, also with shared bias. Each channel detector is dc coupled to a TIA preamplifier through a very low power thermally isolated JFET source follower operating at about 65 K within the FPA housing. The visible channel detectors are ac coupled to TIA preamplifiers and signal chain electronics using MOSFET source followers operating at about 2.5 K within the FPA housing. The detectors, preamplifiers, analog electronics, and grounding are discussed as they evolved and were implemented during FPA retrofit, telescope integration, and preparation for launch.

Published
1984

8. Four band differential radiometer for monitoring LNG vapors

Author

Simmonds, J. J

Subjects
Instrumentation And Photography
Abstract

The development by JPL of a four band differential radiometer (FBDR) which is capable of providing a fast rate of response, accurate measurements of methane, ethane, and propane concentrations on the periphery of a dispersing LNG cloud. The FBDR is a small, low power, lightweight, portable instrument system that uses differential absorption of near infrared radiation by the LNG cloud as a technique for the determination of concentration of the three gases as the LNG cloud passes the instrument position. Instrument design and data analysis approaches are described. The data obtained from the FBDR prototype instrument system deployed in an instrument array during two 40 cubic meter spill tests are discussed.

Published
1981

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