Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 2, pp. 92-102
Methodological issues of data processing from passive microwave radiometer at L-band on the MKA FKI No.1
M.T. Smirnov
1 , D.M. Ermakov
1 1 Fryazino Dept. of V.A. Kotelnikov Institute of Radioengineering and Electronics RAS, Fryazino, Russia
The experiment on passive microwave remote sensing in L range was carried out by means of specially developed scientific equipment "Zond -PP" installed on the small spacecraft MKA, FKI No. 1. The paper discusses methodological issues of processing the information received, mainly in terms of accounting instrumental factors. Analysis of the measurements showed that external interference play a considerable role, but not critical. Along with external interference from active radio sources having local character, sometimes long, regular enough and smooth changes were observed in the measured signals. Based on statistical analysis of a number of sessions, a linear correction function was chosen, which allows to shift the measurement results in the second channel, so that in homogeneous domains signal difference from both channels was minimal in each of the sessions. To assess the validity of the data and test the quality of calibration performed using the "Zond -PP", the results were compared with the results of the European project SMOS measurements. The comparison showed their good agreement. Peculiarities of data processing for retrieving salinity of oceans are discussed. Solving the task to a high accuracy is possible only via statistical averaging of estimates in individual pixels. It is possible, that, given the implemented spatial resolution of the device and high sampling rate, however, in the case of unstable operation of the device, such averaging may become incorrect under certain conditions. Possibilities of joint processing of synchronous optical images and microwave radiometric measurements are considered.
Keywords: Passive microwave radiometric measurements, remote sensing of the Earth
Full textReferences:
- Armand N.A., Tishchenko Yu.G., Savorskii V.P., Smirnov M.T. O nauchnoi programme kosmicheskikh eksperimentov v khode ekspluatatsii KA «MKA-PN1» (On the scientific program of space experiments in the course of exploitation of the space apparatus MKA-PN1)// Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2009, Vol. 6, No. 1, pp. 15–21.
- Ermakov D.M., Smirnov M.T. Faktornyi analiz mnogokanal'nykh sputnikovykh izobrazhenii okeana dlya issledovaniya effektov poverkhnostnogo volneniya (Factor analysis of multi-channel satellite images of the ocean to study the effects of surface roughness), Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2011, Vol. 8, No. 3, pp. 25–32.
- Smirnov M.T., Ermakov D.M., Maklakov S.M., Khaldin A.A., Maksimov A.E. Eksperiment po distantsionnomu SVCh radiometricheskomu zondirovaniyu Zemli v L-diapazone s malogo kosmicheskogo apparata, pervye rezul'taty (Experiment in passive microwave remote sensing of the Earth in the L-band with small satellite, the first results), Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2013, Vol. 10, No. 3, pp. 142–149.
- Smirnov M.T., Khaldin A.A. Predvaritel'nye rezul'taty eksperimentov s SVCh radiometricheskim kompleksom L-diapazona na RS MKS (Analysis of passive microwave L- band data obtained in experiment on RS ISS), Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2012, Vol. 9, No. 2, pp. 160-166.
- Camps A., Font J., Vall-llossera M., Gabarro C., Corbella I., Duffo N., Torres F., Blanch S., Aguasca A., Villarino R., Enrique L., Miranda J.J., Arenas J.J., Julia A., Etcheto J., Caselles V., Weill A., Boutin J., Contardo S., Niclos R., Rivas R., Reising S.C., Wursteisen P., Berger M., Martin-Neira M. The WISE 2000 and 2001 field experiment in support of the SMOS mission: sea surface salinity retrieval, IEEE Trans. on Geoscience and Remote Sensing, 2004, Vol. 42, No. 4, pp. 804-823.
- Kerr Yann, Waldteufel P., Wigneron J. P., Delwart S., Cabot F., Boutin J., Escorihuela M. J., Font J., Reul N., Gruhier C., Juglea S. E., Drinkwater M. R., Hahne A., Martin-Neira M., Mecklenburg S., The SMOS mission: New tool for monitoring key elements of the global water cycle, Proceedings of the IEEE, 2010, Vol. 98, No.. 5, pp. 666-687.
- Macelloni G., Brogioni M., Pampaloni P., Cagnati A. Multifrequency microwave emission from the East Antarctic Plateau: Temporal and spatial variability, IEEE Trans. on Geoscience and Remote Sensing, 2007, Vol. 45, No..7-1, pp. 2029 – 2039.