Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Sinha, S.
- SCATSAT-1 Scatterometer:An Improved Successor of OSCAT
Abstract Views :258 |
PDF Views:98
Authors
T. Misra
1,
P. Chakraborty
1,
C. Lad
1,
P. Gupta
1,
J. Rao
1,
G. Upadhyay
1,
S. Vinay Kumar
1,
B. Saravana Kumar
1,
S. Gangele
1,
S. Sinha
1,
H. Tolani
1,
V. K. Vithani
1,
B. S. Raman
1,
C. V. N. Rao
1,
D. B. Dave
1,
R. Jyoti
1,
N. M. Desai
1
Affiliations
1 Space Applications Centre, ISRO, Ahmedabad 380 015, IN
1 Space Applications Centre, ISRO, Ahmedabad 380 015, IN
Source
Current Science, Vol 117, No 6 (2019), Pagination: 941-949Abstract
SCATSAT-1 is the Indian Space Research Organisation’s (ISRO’s) newest Ku-band scatterometer which was launched on 26 September 2016 from ISRO’s space-port Sriharikota on-board the PSLV C35 mission. It is an advanced follow-on of OSCAT, ISRO’s first Scatterometer in space on-board the Oceansat-2 satellite, which ceased to operate in April 2014. OSCAT had been a globally acclaimed sensor during its lifetime. The data from SCATSAT-1 exhibit superior quality, and will not only serve the operational wind and weather prediction community in the years to come, but also hold the promise of securing a place in the long-term climate data records. SCATSAT-1 is a standalone scatterometer mission atop the Indian Mini Satellite (IMS-2) bus. The scatterometer payload is a two-beam, dual-polarized, conically scanning, pencil beam, real-aperture radar which measures near-surface wind vectors over ocean exploiting Bragg scattering resonance at Ku-band. It has been developed in ISRO’s Space Applications Centre, Ahmedabad in less than two and half years to replace OSCAT. Although it inherits the instrument specifications from OSCAT, several enhancements have been made in its hardware as well as in the payload characterization from the purview of miniaturization and performance improvement over OSCAT. This article highlights the hardware improvements, the payload characterization methods devised, and the performance enhancements of SCATSAT-1 over OSCAT. The in-orbit performance of SCATSAT-1 is also discussed.Keywords
OSCAT, SCATSAT-1, Scatterometer, Sigma-0.Full Text
References
- Misra, T. et al., Oceansat-II scatterometer: sensor performance evaluation, σ 0 analyses and estimation of biases. IEEE Trans. Geosci. Remote Sensing, 2014, 52(6), 3310–3315.
- Impact of Land Use/Land Cover on Soil Carbon and Nitrogen Fractions in North-Eastern Part of India
Abstract Views :56 |
PDF Views:34
Authors
Affiliations
1 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar 736 165, IN
2 Department of Agricultural Statistics, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar 736 165, IN
1 Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar 736 165, IN
2 Department of Agricultural Statistics, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar 736 165, IN
Source
Current Science, Vol 125, No 3 (2023), Pagination: 291-298Abstract
Land use/land cover (LULC) plays a pivotal role in maintaining the carbon (C) and nitrogen (N) balance in the ecosystem. It is also important for controlling soil organic carbon (SOC) levels by affecting the quantity and quality of below- and above-ground litter inputs and subsequent decomposition. The aim of the present study was to understand the effect of LULC on the C and N fractions and their stocks in the Eastern Himalayan floodplain. The study was conducted at the Pundibari campus of Uttar Banga Krishi Viswavidyalaya, Cooch Behar, West Bengal, India, hosting four kinds of land uses – agricultural croplands, grasslands, plantation croplands and human-interfered lands. The soils were acidic (pH 5.13–5.68) irrespective of the LULC type and low in bulk density (1.02–1.27 g/cm3). Estimation of several forms of C and N, viz. SOC, total C, available N, ammoniacal N, nitrate N, total N, C stock, N stock, etc., indicated variations in these forms under different LULC types. Significant variations (P < 0.05) were found for SOC and ammoniacal N content in different LULC types. Both mean C and N stocks were found highest in grassland soils (18.91 and 2.64 t ha–1 respectively), followed by plantation croplands (17.24 and 2.41 t ha–1 respectively).Keywords
Carbon and Nitrogen Stock, Flood Plain, Land Use/Land Cover, Resource Map, Soil Quality.Full Text
References
- Zhu, G., Shangguan, Z., Hu, X. and Deng, L., Effects of land use changes on soil organic carbon, nitrogen and their losses in a typical watershed of the Loess Plateau, China. Ecol. Indic., 2021, 133, 108443.
- Wang, H., Guan, D., Zhang, R., Chen, Y., Hu, Y. and Xiao, L., Soil aggregates and organic carbon affected by the land use change from rice paddy to vegetable field. Ecol. Eng., 2014, 70, 206–211.
- Zhang, C., Liu, G., Xue, S. and Sun, C., Soil organic carbon and total nitrogen storage as affected by land use in a small watershed of the Loess Plateau, China. Eur. J. Soil Biol., 2013, 54, 16–24.
- Seifu, W., Elias, E., Gebresamuel, G. and Khanal, S., Impact of land use type and altitudinal gradient on topsoil organic carbon and nitrogen stocks in the semi-arid watershed of northern Ethiopia. Heliyon, 2021, 16, e06770.
- IPCC, Climate Change: The Physical Science Basis, The Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, UK, 2007.
- Wei, X., Shao, M., Gale, W. and Li, L., Global pattern of soil carbon losses due to the conversion of forests to agricultural land. Sci. Rep., 2014, 4, 4062.
- Tiefenbacher, A., Sandén, T., Haslmayr, H. P., Miloczki, J., Wenzel, W. and Spiegel, H., Optimizing carbon sequestration in croplands: a synthesis. Agronomy, 2021, 11, 882.
- Nyameasem, J. K., Reinsch, T., Taube, F., Domozoro, C. Y. F., Marfo-Ahenkora, E., Emadodin, I. and Malisch, C. S., Nitrogen availability determines the long-term impact of land use change on soil carbon stocks in grasslands of southern Ghana. Soil, 2020, 6, 523–539.
- Palni, L. M. S., Maikuri, R. K. and Rao, K. S., Conservation of the Himalayan agroecosystem: issues and priorities. In Technical Paper-V in Eco Regional Cooperation for Biodiversity Conservation in the Himalaya, United Nation Development Programme, New York, USA, 1998, pp. 253–290.
- Meena, V. S. et al., Land use changes: strategies to improve soil carbon and nitrogen storage pattern in the mid-Himalaya ecosystem, India. Geoderma, 2018, 321, 69–78.
- Voltr, V., Menšík, L., Hlisnikovský, L., Hruška, M., Pokorný, E. and Pospíšilová, L., The soil organic matter in connection with soil properties and soil inputs. Agronomy, 2021, 11, 779.
- Grünzweig, J. M., Sparrow, S. D. and Chapin, F. S., Impact of forest conversion to agriculture on carbon and nitrogen mineralization in subarctic Alaska. Biogeochemistry, 2003, 64, 271–296.
- Ngaba, M., Ma, X. Q. and Hu, Y. L., Variability of soil carbon and nitrogen stocks after conversion of natural forest to plantations in Eastern China. PeerJ, 2020, 8, e8377.
- Blake, G. R., Bulk density. In Methods of Soil Analysis: Part 1 Physical and Mineralogical Properties, Including Statistics of Measurement and Sampling, 9.1 (eds Black, C. A. and Evans, D. D.), American Society of Agronomy, 1965, pp. 374–390.
- Subbiah, B. V. and Asija, G. L., A rapid procedure for assessment of available nitrogen in soils. Curr. Sci., 1956, 31, 159–160.
- Walkley, A. and Black, I. A., An examination of the Degtjareff method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Sci., 1934, 3, 29–38.
- Chan, K. Y., Bowman, A. and Oates, A., Oxidizible organic carbon fractions and soil quality changes in an oxic paleustalf under different pasture leys. Soil Sci., 2001, 166, 61–67.
- Ellert, B. H. and Bettany, J. R., Calculation of organic matter and nutrients stored in soils under contrasting management regimes. Can. J. Soil Sci., 1995, 75, 529–538.
- Keeney, D. R. and Bremner, J. M., Comparison and evaluation of laboratory methods of obtaining an index of soil nitrogen availability. Agron. J., 1966, 58, 498–503.
- Toru, T. and Kibret, K., Carbon stock under major land use/land cover types of Hades sub-watershed, eastern Ethiopia. Carbon Balance Manage., 2019, 14, 1–15.
- Negasa, D. J., Effects of land use types on selected soil properties in Central Highlands of Ethiopia. Appl. Environ. Soil Sci., 2020, 2020, 7026929.
- Yang, S., Sheng, D., Adamowski, J., Gong, Y., Zhang, J. and Cao, J., Effect of land use change on soil carbon storage over the last 40 years in the Shi Yang river basin, China. Land, 2018, 7, 1–9.
- Zhao, X. et al., Management-induced changes to soil organic carbon in China: a meta-analysis. Adv. Agron., 2015, 134, 1–50.
- Jafarian, Z. and Kavian, A., Effects of land-use change on soil organic carbon and nitrogen. Commun. Soil Sci. Plant Anal., 2013, 44, 339–346.
- Kenye, A., Sahoo, U. K., Singh, S. L. and Gogoii, A., Soil organic carbon stock of different land uses of Mizoram, Northeast India. AIMS J., 2019, 5, 25–40.
- Deb, S., Chakraborty, S., Weindorf, D. C., Murmu, A., Banik, P, Debnath, M. K. and Choudhury, A., Dynamics of organic carbon in deep soils under rice and non-rice cropping systems. Geoderma Reg., 2016, 7, 388–394
- Xue, Z. J., Man, C. and An, S. S., Soil nitrogen distributions for different land uses and landscape positions in a small watershed on Loess Plateau, China. Ecol. Eng., 2013, 60, 204–213.