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21 results on '"Perun, V. S."'

1. Validation of Aura Microwave Limb Sounder HCl measurements

Author

Froidevaux, L, Jiang, Y. B, Lambert, A, Livesey, N. J, Read, W. G, Waters, J. W, Fuller, R. A, Marcy, T. P, Popp, P. J, Gao, R. S, Fahey, D. W, Jucks, K. W, Stachnik, R. A, Toon, G. C, Christensen, L. E, Webster, C. R, Bernath, P. F, Boone, C. D, Harwood, R. S, Walker, K. A, Pumphrey, H. C, Manney, G. L, Schwartz, M. J, Daffer, W. H, Drouin, B. J, Cofield, R. E, Cuddy, D. T, Jarnot, R. F, Knosp, B. W, Perun, V. S, Snyder, W. V, Stek, P. C, Thurstans, R. P, and Wagner, P. A

Published
2008

2. Validation of Aura Microwave Limb Sounder O3 and CO Observations in the Upper Troposphere and Lower Stratosphere

Author

Livesey, N. J, Filipiak, M. J, Froidevaux, L, Read, W. G, Lambert, A, Santee, J. L, Jiang, J. H, Pumphrey, H. C, Waters, J. W, Cofield, R. E, Cuddy, D. T, Daffer, W. H, Drouin, B. J, Fuller, R. A, Jarnot, R. F, Jiang, Y. B, Knosp, B. W, Li, Q. B, Perun, V. S, Schwartz, M. J, Snyder, W. V, Stek, P. C, Thurstans, R. P, Wagner, P. A, and Avery, M

Subjects
Geophysics
Abstract

Global satellite observations of ozone and carbon monoxide from the Microwave Limb Sounder (MLS) on the EOS Aura spacecraft are discussed with emphasis on those observations in the 2 15 - 100 hPa region (the upper troposphere and lower stratosphere). The precision, resolution and accuracy of the data produced by the MLS "version 2.2" processing algorithms are discussed and quantified. O3 accuracy is estimated at approx.40 ppbv +5% (approx.20 ppbv +20% at 215 hPa) while the CO accuracy is estimated at approx.30 ppbv +30% for pressures of 147 hPa and less. Comparisons with expectations and other observations show good agreements for the O3 product, generally consistent with the systematic errors quoted above. In the case of COY a persistent factor of approx.2 high bias is seen at 215 hPa. However, the morphology is shown to be realistic, consistent with raw MLS radiance data, and useful for scientific study. The MLS CO data at higher altitudes are shown to be consistent with other observations.

Published
2008
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3. Validation of Aura Microwave Limb Sounder Ozone by Ozonesonde and Lidar Measurements

Author

Jiang, Y. B, Froidevaux, L, Lambert, A, Livesey, N. J, Read, W. G, Waters, J. W, Bojkov, B, Leblanc, T, McDermid, I. S, Godin-Beekmann, S, Filipiak, M. J, Harwood, R. S, Fuller, R. A, Daffer, W. H, Drouin, B. J, Cofield, R. E, Cuddy, D. T, Jarnot, R. F, Knosp, B. W, Perun, V. S, Schwartz, W. V, Snyder, P. C, Stek, R. P, Thurstans, P. A, and Wagner, M. J

Subjects
Meteorology And Climatology
Abstract

We present validation studies of MLS version 2.2 upper tropospheric and stratospheric ozone profiles using ozonesonde and lidar data as well as climatological data. Ozone measurements from over 60 ozonesonde stations worldwide and three lidar stations are compared with coincident MLS data. The MLS ozone stratospheric data between 150 and 3 hPa agree well with ozonesonde measurements, within 8% for the global average. MLS values at 215 hPa are biased high compared to ozonesondes by approximately 20% at middle to high latitude, although there is a lot of variability in this altitude region.

Published
2007
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4. Validation of the Aura Microwave Limb Sounder middle atmosphere water vapor and nitrous oxide measurements

Author

Atlas, E, Elkins, J. W, Murtagh, D, Urban, J, Walker, K. A, Boone, C. D, Bernath, P. F, Stachnik, R. A, Toon, G. C, Jucks, K. W, Waters, J. W, Wagner, P. A, Thurstans, R. P, Stek, P. C, Snyder, W. V, Perun, V. S, Pickett, H. M, Knosp, B. W, Jarnot, R. F, Fuller, R. A, Drouin, B. J, Daffer, W. H, Cuddy, D. T, Cofield, R. E, Nedoluha, G. E, Jimenez, C, Pumphrey, H. C, Schwartz, M. J, Wu, D. L, Froidevaux, L, Manney, G. L, Santee, M. L, Livesey, N. J, Read, W. G, and Lambert, A

Abstract

The quality of the version 2.2 (v2.2) middle atmosphere water vapor and nitrous oxide measurements from the Microwave Limb Sounder (MLS) on the Earth Observing System (EOS) Aura satellite is assessed. The impacts of the various sources of systematic error are estimated by a comprehensive set of retrieval simulations. Comparisons with correlative data sets from ground-based, balloon and satellite platforms operating in the UV/visible, infrared and microwave regions of the spectrum are performed. Precision estimates are also validated, and recommendations are given on the data usage. The v2.2 H2O data have been improved over v1.5 by providing higher vertical resolution in the lower stratosphere and better precision above the stratopause. The single-profile precision is ~0.2–0.3 ppmv (4–9%), and the vertical resolution is ~3–4 km in the stratosphere. The precision and vertical resolution become worse with increasing height above the stratopause. Over the pressure range 0.1–0.01 hPa the precision degrades from 0.4 to 1.1 ppmv (6–34%), and the vertical resolution degrades to ~12–16 km. The accuracy is estimated to be 0.2–0.5 ppmv (4–11%) for the pressure range 68–0.01 hPa. The scientifically useful range of the H2O data is from 316 to 0.002 hPa, although only the 82–0.002 hPa pressure range is validated here. Substantial improvement has been achieved in the v2.2 N2O data over v1.5 by reducing a significant low bias in the stratosphere and eliminating unrealistically high biased mixing ratios in the polar regions. The single-profile precision is ~13–25 ppbv (7–38%), the vertical resolution is ~4–6 km and the accuracy is estimated to be 3–70 ppbv (9–25%) for the pressure range 100–4.6 hPa. The scientifically useful range of the N2O data is from 100 to 1 hPa.

Published
2007

5. Validation of the Aura Microwave Limb Sounder middle atmosphere water vapor and nitrous oxide measurements

Author

Lambert, A, Read, W. G, Livesey, N. J, Santee, M. L, Manney, G. L, Froidevaux, L, Wu, D. L, Schwartz, M. J, Pumphrey, H. C, Jimenez, C, Nedoluha, G. E, Cofield, R. E, Cuddy, D. T, Daffer, W. H, Drouin, B. J, Fuller, R. A, Jarnot, R. F, Knosp, B. W, Pickett, H. M, Perun, V. S, Snyder, W. V, Stek, P. C, Thurstans, R. P, Wagner, P. A, Waters, J. W, Jucks, K. W, Toon, G. C, Stachnik, R. A, Bernath, P. F, Boone, C. D, Walker, K. A, Urban, J, Murtagh, D, Elkins, J. W, and Atlas, E

Published
2007

6. Software management and implementation plan for the Microwave Limb Sounder (MLS) carried on a NASA Earth Observing System (EOS) satellite

Author

Shaw, H. Y, Girard, M. A, Perun, V. S, and Sherif, J. S

Subjects
Computer Programming And Software
Abstract

This paper presents a Software Management and Implementation Plan (SIMP) for managing and controlling the development of the Microwave Limb Sounder (MLS) instrument software, and the Instrument Ground Support Equipment (IGSE) software.

Published
2003

7. Validation of UARS Microwave Limb Sounder ClO Measurements

Author

Waters, J. W, Read, W. G, Froidevaux, L, Lungu, T. A, Perun, V. S, Stachnik, R. A, Jarnot, R. F, Cofield, R. E, Fishbein, E. F, Flower, D. A, Burke, J. R, Hardy, J. C, Nakamura, L. L, Ridenoure, B. P, Shippony, Z, Thurstans, R. P, Avallone, L. M, Toohey, D. W, deZafra, R. L, and Shindell, D. T

Subjects
Environment Pollution
Abstract

Validation of stratospheric ClO measurements by the Microwave Limb Sounder (MLS) on the Upper Atmosphere Research Satellite (UARS) is described. Credibility of the measurements is established by (1) the consistency of the measured ClO spectral emission line with the retrieved ClO profiles and (2) comparisons of ClO from MLS with that from correlative measurements by balloon-based, ground-based, and aircraft-based instruments. Values of "noise" (random), "scaling" (multiplicative), and "bias" (additive) uncertainties are determined for the Version 3 data, in the first version public release of the known artifacts in these data are identified. Comparisons with correlative measurements indicate agreement to within the combined uncertainties expected for MLS and the other measurements being compared. It is concluded that MLS Version 3 ClO data, with proper consideration of the uncertainties and "quality" parameters produced with these data, can be used for scientific analyses at retrieval surfaces between 46 and 1 hPa (approximately 20-50 km in height). Future work is planned to correct known problems in the data and improve their quality.

Published
1996
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8. Validation of Aura Microwave Limb Sounder Ozone by Ozonesonde and Lidar Measurements

Author

Jiang, Y., Livesey, N. J., Read, W. G., Waters, J. W., Bojkov, B., Leblanc, T., Mcdermid, I. S., Godin Beekmann, S., Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee, G., Davies, J., De Backer, H., Dier, H., Fujiwara, M., Johnson, B., Kelder, H., Leme, N. P., König Langlo, G., Kyro, E., Laneve, Giovanni, and Thompson, A.

Subjects
validation, ozone, ozonesonde, MLS, Aura
Published
2007

9. Validation of Aura Microwave Limb Sounder Ozone by ozonesonde and Lidar Measurements

Author

Jiang, Yong, Froidevaux, L., Lambert, A., Livesey, N. J., Read, W. G., Waters, J. W., Bojkov, B., Leblanc, T., McDermid, I. S., Godin-Beekmann, S., Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee, G., Davies, J., De Backer, H., Dier, H., Fujiwara, M., Johnson, B., Kelder, H., Leme, N. P., König-Langlo, Gert, Kyro, E., Laneve, G., Fook, L. S., Merrill, J., Morris, G., Newchurch, M., Oltmans, S., Parrondos, M. C., Posny, F., Schmidlin, F., Skrivankova, P., Stubi, R., Tarasick, D., Thompson, A., Thouret, V., Viatte, P., Vömel, H., von der Gathen, Peter, Yela, M., Zablocki, G., Jiang, Yong, Froidevaux, L., Lambert, A., Livesey, N. J., Read, W. G., Waters, J. W., Bojkov, B., Leblanc, T., McDermid, I. S., Godin-Beekmann, S., Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee, G., Davies, J., De Backer, H., Dier, H., Fujiwara, M., Johnson, B., Kelder, H., Leme, N. P., König-Langlo, Gert, Kyro, E., Laneve, G., Fook, L. S., Merrill, J., Morris, G., Newchurch, M., Oltmans, S., Parrondos, M. C., Posny, F., Schmidlin, F., Skrivankova, P., Stubi, R., Tarasick, D., Thompson, A., Thouret, V., Viatte, P., Vömel, H., von der Gathen, Peter, Yela, M., and Zablocki, G.

Published
2007

10. Validation of Aura Microwave Limb Sounder Ozone by ozonesonde and lidar measurements

Author

Jiang, Y. B., Froidevaux, L., Lambert, A., Livesey, N. J., Read, W. G., Waters, J. W., Bojkov, B., Leblanc, T., McDermid, I. S., Godin-Beekmann, S., Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee, G., Davies, J., De Backer, H., Dier, H., 1000000360941, Fujiwara, M., Johnson, B., Kelder, H., Leme, N. P., König-Langlo, G., Kyro, E., Laneve, G., Fook, L. S., Merrill, J., Morris, G., Newchurch, M., Oltmans, S., Parrondos, M. C., Posny, F., Schmidlin, F., Skrivankova, P., Stubi, R., Tarasick, D., Thompson, A., Thouret, V., Viatte, P., Vömel, H., von Der Gathen, P., Yela, M., Zablocki, G., Jiang, Y. B., Froidevaux, L., Lambert, A., Livesey, N. J., Read, W. G., Waters, J. W., Bojkov, B., Leblanc, T., McDermid, I. S., Godin-Beekmann, S., Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S., Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee, G., Davies, J., De Backer, H., Dier, H., 1000000360941, Fujiwara, M., Johnson, B., Kelder, H., Leme, N. P., König-Langlo, G., Kyro, E., Laneve, G., Fook, L. S., Merrill, J., Morris, G., Newchurch, M., Oltmans, S., Parrondos, M. C., Posny, F., Schmidlin, F., Skrivankova, P., Stubi, R., Tarasick, D., Thompson, A., Thouret, V., Viatte, P., Vömel, H., von Der Gathen, P., Yela, M., and Zablocki, G.

Published
2007

11. Validation of Aura Microwave Limb Sounder OH and HO2 measurements

Author

Pickett, H. M., primary, Drouin, B. J., additional, Canty, T., additional, Salawitch, R. J., additional, Fuller, R. A., additional, Perun, V. S., additional, Livesey, N. J., additional, Waters, J. W., additional, Stachnik, R. A., additional, Sander, S. P., additional, Traub, W. A., additional, Jucks, K. W., additional, and Minschwaner, K., additional

Published
2008
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12. Validation of Aura Microwave Limb Sounder HCl measurements

Author

Froidevaux, L., primary, Jiang, Y. B., additional, Lambert, A., additional, Livesey, N. J., additional, Read, W. G., additional, Waters, J. W., additional, Fuller, R. A., additional, Marcy, T. P., additional, Popp, P. J., additional, Gao, R. S., additional, Fahey, D. W., additional, Jucks, K. W., additional, Stachnik, R. A., additional, Toon, G. C., additional, Christensen, L. E., additional, Webster, C. R., additional, Bernath, P. F., additional, Boone, C. D., additional, Walker, K. A., additional, Pumphrey, H. C., additional, Harwood, R. S., additional, Manney, G. L., additional, Schwartz, M. J., additional, Daffer, W. H., additional, Drouin, B. J., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Jarnot, R. F., additional, Knosp, B. W., additional, Perun, V. S., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, and Wagner, P. A., additional

Published
2008
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13. Validation of the Aura Microwave Limb Sounder ClO measurements

Author

Santee, M. L., primary, Lambert, A., additional, Read, W. G., additional, Livesey, N. J., additional, Manney, G. L., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Daffer, W. H., additional, Drouin, B. J., additional, Froidevaux, L., additional, Fuller, R. A., additional, Jarnot, R. F., additional, Knosp, B. W., additional, Perun, V. S., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, Wagner, P. A., additional, Waters, J. W., additional, Connor, B., additional, Urban, J., additional, Murtagh, D., additional, Ricaud, P., additional, Barret, B., additional, Kleinböhl, A., additional, Kuttippurath, J., additional, Küllmann, H., additional, von Hobe, M., additional, Toon, G. C., additional, and Stachnik, R. A., additional

Published
2008
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14. Validation of Aura Microwave Limb Sounder stratospheric ozone measurements

Author

Froidevaux, L., primary, Jiang, Y. B., additional, Lambert, A., additional, Livesey, N. J., additional, Read, W. G., additional, Waters, J. W., additional, Browell, E. V., additional, Hair, J. W., additional, Avery, M. A., additional, McGee, T. J., additional, Twigg, L. W., additional, Sumnicht, G. K., additional, Jucks, K. W., additional, Margitan, J. J., additional, Sen, B., additional, Stachnik, R. A., additional, Toon, G. C., additional, Bernath, P. F., additional, Boone, C. D., additional, Walker, K. A., additional, Filipiak, M. J., additional, Harwood, R. S., additional, Fuller, R. A., additional, Manney, G. L., additional, Schwartz, M. J., additional, Daffer, W. H., additional, Drouin, B. J., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Jarnot, R. F., additional, Knosp, B. W., additional, Perun, V. S., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, and Wagner, P. A., additional

Published
2008
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15. Validation of Aura Microwave Limb Sounder O3and CO observations in the upper troposphere and lower stratosphere

Author

Livesey, N. J., primary, Filipiak, M. J., additional, Froidevaux, L., additional, Read, W. G., additional, Lambert, A., additional, Santee, M. L., additional, Jiang, J. H., additional, Pumphrey, H. C., additional, Waters, J. W., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Daffer, W. H., additional, Drouin, B. J., additional, Fuller, R. A., additional, Jarnot, R. F., additional, Jiang, Y. B., additional, Knosp, B. W., additional, Li, Q. B., additional, Perun, V. S., additional, Schwartz, M. J., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, Wagner, P. A., additional, Avery, M., additional, Browell, E. V., additional, Cammas, J.‐P., additional, Christensen, L. E., additional, Diskin, G. S., additional, Gao, R.‐S., additional, Jost, H.‐J., additional, Loewenstein, M., additional, Lopez, J. D., additional, Nedelec, P., additional, Osterman, G. B., additional, Sachse, G. W., additional, and Webster, C. R., additional

Published
2008
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16. Validation of the Aura Microwave Limb Sounder HNO3 measurements

Author

Santee, M. L., primary, Lambert, A., additional, Read, W. G., additional, Livesey, N. J., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Daffer, W. H., additional, Drouin, B. J., additional, Froidevaux, L., additional, Fuller, R. A., additional, Jarnot, R. F., additional, Knosp, B. W., additional, Manney, G. L., additional, Perun, V. S., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, Wagner, P. A., additional, Waters, J. W., additional, Muscari, G., additional, de Zafra, R. L., additional, Dibb, J. E., additional, Fahey, D. W., additional, Popp, P. J., additional, Marcy, T. P., additional, Jucks, K. W., additional, Toon, G. C., additional, Stachnik, R. A., additional, Bernath, P. F., additional, Boone, C. D., additional, Walker, K. A., additional, Urban, J., additional, and Murtagh, D., additional

Published
2007
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17. Validation of the Aura Microwave Limb Sounder middle atmosphere water vapor and nitrous oxide measurements

Author

Lambert, A., primary, Read, W. G., additional, Livesey, N. J., additional, Santee, M. L., additional, Manney, G. L., additional, Froidevaux, L., additional, Wu, D. L., additional, Schwartz, M. J., additional, Pumphrey, H. C., additional, Jimenez, C., additional, Nedoluha, G. E., additional, Cofield, R. E., additional, Cuddy, D. T., additional, Daffer, W. H., additional, Drouin, B. J., additional, Fuller, R. A., additional, Jarnot, R. F., additional, Knosp, B. W., additional, Pickett, H. M., additional, Perun, V. S., additional, Snyder, W. V., additional, Stek, P. C., additional, Thurstans, R. P., additional, Wagner, P. A., additional, Waters, J. W., additional, Jucks, K. W., additional, Toon, G. C., additional, Stachnik, R. A., additional, Bernath, P. F., additional, Boone, C. D., additional, Walker, K. A., additional, Urban, J., additional, Murtagh, D., additional, Elkins, J. W., additional, and Atlas, E., additional

Published
2007
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18. TheUARSand EOS Microwave Limb Sounder (MLS) Experiments

Author

Waters, J. W., primary, Read, W. G., additional, Froidevaux, L., additional, Jarnot, R. F., additional, Cofield, R. E., additional, Flower, D. A., additional, Lau, G. K., additional, Pickett, H. M., additional, Santee, M. L., additional, Wu, D. L., additional, Boyles, M. A., additional, Burke, J. R., additional, Lay, R. R., additional, Loo, M. S., additional, Livesey, N. J., additional, Lungu, T. A., additional, Manney, G. L., additional, Nakamura, L. L., additional, Perun, V. S., additional, Ridenoure, B. P., additional, Shippony, Z., additional, Siegel, P. H., additional, Thurstans, R. P., additional, Harwood, R. S., additional, Pumphrey, H. C., additional, and Filipiak, M. J., additional

Published
1999
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21. Validation of the Aura Microwave Limb Sounder HNO3 measurements.

Author

Santee, M. L., Lambert, A., Read, W. G., Livesey, N. J., Cofield, R. E., Cuddy, D. T., Daffer, W. H., Drouin, B. J., Froidevaux, L., Fuller, R. A., Jarnot, R. F., Knosp, B. W., Manney, G. L., Perun, V. S., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Waters, J. W., and Muscari, G.

Published
2007
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