A 180 GHz prototype for a geostationary microwave imager/sounder-GeoSTAR-III

Gaier, T.; Kangaslahti, Pekka; Lambrigtsen, Bjorn; Ramos-Perez, I.; Tanner, Alan; McKague, Darren; Ruf, Christopher; Flynn, Michael P.; Zhang, Zhengya; Backhus, Roger; Austerberry, David

doi:10.1109/igarss.2016.7729521

Cited by 20 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper mainly focuses on the potential impact of this kind of geostationary microwave radiances on typhoon prediction. The microwave-based sounder onboard geostationary satellite can detect the vertical distribution of temperature and humidity inside clouds as well as precipitation, constantly and frequently monitoring a fixed area and acquiring extremely high temporal resolution on wide-range Earth observation [60]. Thus, the GEOMS has the capability of continuously observing disastrous weather conditions such as tropical cyclones and heavy rainfall that happen suddenly and with a short duration in a microwave view.…”

Section: The Geoms and Its Simulated Radiancesmentioning

confidence: 99%

The Potential Impact of Assimilating Synthetic Microwave Radiances Onboard a Future Geostationary Satellite on the Prediction of Typhoon Lekima Using the WRF Model

Wang

Chen

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

Geostationary meteorological satellites can provide continuous observations of high-impact weather events with a high temporal and spatial resolution. Sounding the atmosphere using a microwave instrument onboard a geostationary satellite has aroused great study interests for years, as it would increase the observational efficiency as well as provide a new perspective in the microwave spectrum to the measuring capability for the current observational system. In this study, the capability of assimilating future geostationary microwave sounder (GEOMS) radiances was developed in the Weather Research and Forecasting (WRF) model’s data assimilation (WRFDA) system. To investigate if these frequently updated and widely distributed microwave radiances would be beneficial for typhoon prediction, observational system simulation experiments (OSSEs) using synthetic microwave radiances were conducted using the mesoscale numerical model WRF and the advanced hybrid ensemble–variational data assimilation method for the Lekima typhoon that occurred in early August 2019. The results show that general positive forecast impacts were achieved in the OSSEs due to the assimilation of GEOMS radiances: errors of analyses and forecasts in terms of wind, humidity, and temperature were both reduced after assimilating GEOMS radiances when verified against ERA-5 data. The track and intensity predictions of Lekima were also improved before 68 h compared to the best track data in this study. In addition, rainfall forecast improvements were also found due to the assimilation impact of GEOMS radiances. In general, microwave observations from geostationary satellites provide the possibility of frequently assimilating wide-ranging microwave information into a regional model in a finer resolution, which can potentially help improve numerical weather prediction (NWP).

show abstract

Section: The Geoms and Its Simulated Radiancesmentioning

confidence: 99%

The Potential Impact of Assimilating Synthetic Microwave Radiances Onboard a Future Geostationary Satellite on the Prediction of Typhoon Lekima Using the WRF Model

Wang

Chen

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…GEO visible/infrared (VIS/IR) new sensors at very high spatial and temporal resolution are now enhancing the observational capabilities of clouds and precipitation systems [136][137][138]. The development of PMW sensors for GEO satellites has been ongoing for more than a decade [139], but the concept seems at the moment to have been superseded by the smallsat constellations. However, it may come back in the near future, as some countries are continuing feasibility studies.…”

Section: Evolution Of Heritage Missionsmentioning

confidence: 99%

Satellite Remote Sensing of Precipitation and the Terrestrial Water Cycle in a Changing Climate

2019

View full text Add to dashboard Cite

The water cycle is the most essential supporting physical mechanism ensuring the existence of life on Earth. Its components encompass the atmosphere, land, and oceans. The cycle is composed of evaporation, evapotranspiration, sublimation, water vapor transport, condensation, precipitation, runoff, infiltration and percolation, groundwater flow, and plant uptake. For a correct closure of the global water cycle, observations are needed of all these processes with a global perspective. In particular, precipitation requires continuous monitoring, as it is the most important component of the cycle, especially under changing climatic conditions. Passive and active sensors on board meteorological and environmental satellites now make reasonably complete data available that allow better measurements of precipitation to be made from space, in order to improve our understanding of the cycle’s acceleration/deceleration under current and projected climate conditions. The article aims to draw an up-to-date picture of the current status of observations of precipitation from space, with an outlook to the near future of the satellite constellation, modeling applications, and water resource management.

show abstract

“…There are a few examples of using GPUs in large radio telescope systems such as Murchison Widefield Array (MWA) [ 14 ], but even in this system data acquisition and correlation is performed by FPGA devices and GPUs are only used for carrying out some complex processing tasks after correlation. ASIC, on the other hand, provides the most efficient and customizable solution as it can also be observed that two of the most recent relevant projects i.e., GAS [ 19 ] and GeoSTAR [ 22 ] chose to go for ASIC as the best possible solution. However, considering its high Non-Recurring Engineering (NRE) cost limits this option for our project at this stage when we are still trying different techniques for obtaining the best results.…”

Section: Correlation System Designmentioning

confidence: 99%

“…This chip developed for GeoSTAR-II was able to perform 19 × 19, 2-bit correlations with 500 MHz bandwidth while consuming 250 uW/correlation. For the next prototype i.e., GeoSTAR-III a 64 × 64 correlator ASIC was developed with integrated 2-bit A/D conversion for 64 inputs channels and could operate at a nominal frequency of 1 GHz [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Frequency Based Design Partitioning to Achieve Higher Throughput in Digital Cross Correlator for Aperture Synthesis Passive MMW Imager

Asif

Guo

Zhang

et al. 2018

Sensors

View full text Add to dashboard Cite

Digital cross-correlation is central to many applications including but not limited to Digital Image Processing, Satellite Navigation and Remote Sensing. With recent advancements in digital technology, the computational demands of such applications have increased enormously. In this paper we are presenting a high throughput digital cross correlator, capable of processing 1-bit digitized stream, at the rate of up to 2 GHz, simultaneously on 64 channels i.e., approximately 4 Trillion correlation and accumulation operations per second. In order to achieve higher throughput, we have focused on frequency based partitioning of our design and tried to minimize and localize high frequency operations. This correlator is designed for a Passive Millimeter Wave Imager intended for the detection of contraband items concealed on human body. The goals are to increase the system bandwidth, achieve video rate imaging, improve sensitivity and reduce the size. Design methodology is detailed in subsequent sections, elaborating the techniques enabling high throughput. The design is verified for Xilinx Kintex UltraScale device in simulation and the implementation results are given in terms of device utilization and power consumption estimates. Our results show considerable improvements in throughput as compared to our baseline design, while the correlator successfully meets the functional requirements.

show abstract

A 180 GHz prototype for a geostationary microwave imager/sounder-GeoSTAR-III

Cited by 20 publications

References 4 publications

The Potential Impact of Assimilating Synthetic Microwave Radiances Onboard a Future Geostationary Satellite on the Prediction of Typhoon Lekima Using the WRF Model

The Potential Impact of Assimilating Synthetic Microwave Radiances Onboard a Future Geostationary Satellite on the Prediction of Typhoon Lekima Using the WRF Model

Satellite Remote Sensing of Precipitation and the Terrestrial Water Cycle in a Changing Climate

Frequency Based Design Partitioning to Achieve Higher Throughput in Digital Cross Correlator for Aperture Synthesis Passive MMW Imager

Contact Info

Product

Resources

About