Radiometer calibration of airborne L-band active and passive microwave detector
نویسندگان
چکیده
é¥æè¯éªæ¯è¿è¡é¥æåççéªè¯ãé¥æ模åä¸åæ¼æ¹æ³çåå±ãé¥æ产åççå®æ§æ£éªï¼æ¨å¨å«æ计åç论è¯å®æ½åå ¶è§æµå¨å°çç³»ç»ç§å¦ä¸åºç¨çéè¦éå¾ãå¨éªçµæ²³æµå水循ç¯ä¸è½é平衡é¥æ综åè¯éªä¸ï¼å©ç¨æºè½½L波段主被å¨ä¸ä½å微波æ¢æµä»ªå¼å±äºä»¥å壤水å为é¦è¦ç®æ ç大åèªç©ºé¥æè¯éªãå ¶ä¸ï¼è¢«å¨æ¢æµé¨åå³å¾®æ³¢è¾å°è®¡éç¨å¾®å¸¦å¤©çº¿ï¼è¾ 以æºæ¢°æ«ææ¹å¼è¿è¡å¤è§åº¦æåè§æµã为æææ¯æ微波è¾å°è®¡æ°æ®çå¤çåå®éåæ¼ï¼å¿ 须对æºè½½å¾®æ³¢è¾å°è®¡è¿è¡å®æ¶å®æ ï¼æ¬æéç¨åæ¥å®æ æ³è¿è¡è¾å°äº®æ¸©çå®æ ï¼å³å¨å®éªå®¤å¯¹å®æ é¾è·¯ä¸çåªå£°æºè¿è¡å®æ ï¼å¾åºå¯¹åºçè¾å°äº®æ¸©ï¼é£è¡è¯éªä¸ï¼å©ç¨è¯¥ä¸¤ä¸ªåèç¹å¾å°è¾å°è®¡è¾åºçµåå亮温çå ³ç³»ï¼åæ¶éåè¯éªåºåéè¿çæ°´ä½ä½ä¸ºå¤å®æ åèç¹ï¼è¿è¡å®æ æ¹ç¨çä¿®æ£ãç»æ表æï¼æºè½½è¾å°äº®æ¸©ä¸å°é¢åèç¹ï¼èå°ï¼æ¨¡æ亮温æ¯è¾å»åï¼äºè 对æ¯ç»ææ¾ç¤ºåæ¹æ ¹è¯¯å·®æå°ä¸º0.93 Kï¼2018-09-26ï¼Hæåï¼ï¼æ ååæ¹æ ¹è¯¯å·®æå°ä¸º0.96 Kï¼2018-09-24ï¼Væåï¼ï¼æææ¯æäºå½äº§L波段微波è¾å°è®¡ç¸å ³å«æ计åç论è¯ä»¥ååç»çå®éåæ¼ä¸é尺度çç¸å ³ç 究工ä½çå¼å±ã
منابع مشابه
Soil Moisture Active/Passive (SMAP) L-Band Microwave Radiometer Post-Launch Calibration
Abstract— The SMAP microwave radiometer is a fully-polarimetric L-band radiometer flown on the SMAP satellite in a 6 AM/ 6 PM sun-synchronous orbit at 685 km altitude. Since April, 2015, the radiometer is under calibration and validation to assess the quality of the radiometer L1B data product. Calibration methods including the SMAP L1B TA2TB (from Antenna Temperature (TA) to the Earth’s surf...
متن کاملPolarimetric Microwave Radiometer Calibration
A polarimetric radiometer is a radiometer with the capability to measure the correlation information between vertically and horizontally polarized electric fields. To better understand and calibrate this type of radiometer, several research efforts have been undertaken. 1) All microwave radiometer measurements of brightness temperature (7B) include an additive noise component. The variance and ...
متن کاملDesign of an L-Band Microwave Radiometer with Active Mitigation of Interference
For increased sensitivity in L-band radiometry, bandwidths on the order of 100 MHz are desirable. This will likely require active countermeasures to mitigate RFI. In this paper, we describe a new radiometer which coherently samples 100 MHz of spectrum and applies realtime RFI mitigation techniques using FPGAs. A field test of an interim version of this design in a radio astronomy observation co...
متن کاملSoil moisture retrieval using the passive/active L- and S-band radar/radiometer
In the present study, remote sensing of soil moisture is carried out using the Passive and Active Land S-band airborne sensor (PALS). The data in this paper were taken from 5 days of overflights near Chickasha, Oklahoma during the 1999 Southern Great Plains (SGP) experiment. Presently, we analyze the collected data to understand the relationships between the observed signals (radiometer brightn...
متن کاملL-band Interference Suppressing Radiometer (LISR) Ground-based Observations with JPL’s Passive-Active L/S Band (PALS) Sensor
2 System Configuration 3 2.1 PALS Radiometer Front End and Downconversion Stages . . . . . . . 3 2.2 PALS State Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 LISR Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Capture Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.5 APB . . . . . . . . . . . . . . . . . . . . . . . . . ....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of remote sensing
سال: 2021
ISSN: ['1007-4619', '2095-9494']
DOI: https://doi.org/10.11834/jrs.20210358