Performance analysis of 60-min to 1-min integration time rain rate conversion models in Malaysia

Ng, Yun Yann; Singh, Mandeep Singh Jit; Thiruchelvam, Vinesh

doi:10.1016/j.jastp.2017.10.004

Cited by 9 publications

(14 citation statements)

References 9 publications

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“…The analytical method for rain rate modelling, as defined by Ng (2017), is considered when the shape of cumulative distribution of rain rate is maintained while parameters that determine the shape depend on the rain rate integration time. Uniformly acknowledged research includes Moupfouma and Martin method, Karasawa and Matsudo method and Ito and Hosaya method.…”

Section: The Analytical Methodsmentioning

confidence: 99%

“…Elementarily, the two basic laws mostly used in empirical methods are the power law and the power-exponential law. In Ng et al (2017), the laws are expressed as follows: R 1 (P) = aR T (P) b (12) where R 1 (P) and R T (P) are, respectively, the rain rate for a one-minute integration time and any integration time (T), at equal percentage of exceedance (P). Constant parameters a and b have their respective rain rate integration times, T.…”

Section: The Empirical Methodsmentioning

confidence: 99%

“…The established conversion methods are grouped into different classes based on their functional principles as defined by (Ng et al, 2017):…”

Section: Review Of Rain Rate Integration Timementioning

confidence: 99%

See 2 more Smart Citations

Rain Attenuation Prediction Models in Microwave and Millimeter Bands for Satellite Communication System: A Review

Busari¹,

Fakolujo²

2021

FUOYEJET

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The progressively demand on satellite communication systems has consequently resulted in lower frequency bands getting more congested. The usage of frequency band beyond 10 GHz is in focus nowadays as a result of the rapid expansion of radio communication systems. However, Rain is the leading attenuation factor of different communication signal of frequencies beyond 10 GHz. Attenuation due to rain has a significant propagation effect that needs to be carefully considered in satellite communication system network. Rain attenuation predictions and rain rate are essential when planning microwave satellite communication links. A review of the rain rate integration time and rain attenuation models for microwave and millimeter bands satellite system is presented. Keywords: Frequency Band, Rain Attenuation, Rain Attenuation Model, Rain Rate, Satellite System

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Section: The Analytical Methodsmentioning

confidence: 99%

Section: The Empirical Methodsmentioning

confidence: 99%

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Rain Attenuation Prediction Models in Microwave and Millimeter Bands for Satellite Communication System: A Review

Busari¹,

Fakolujo²

2021

FUOYEJET

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“…Since it may be a cost-effective and productive technique for combating rain constriction, the time differing qualities approach is one of the reasonable support methodologies [5], It's moreover utilized in fawning communication to enhance performance over a corrupting connect [6]. Within the existing arrange network, measured rain attenuation information isn't accessible in higher recurrence bands, whereas measured rain rate information is accessible in numerous locales [7]. By changing SST rain rate information into comparable watched rain constriction information, the transient differing qualities for higher recurrence groups may be expanded.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Time Diversity Gain – Comparison Between ITU-R P.618-13 Using a Concept of Rain Rate with Delay and Synthetic Storm Technique

Alam

Hasan

Islam

et al. 2022

Int. J. Interact. Mob. Technol.

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Future satellite companies will use higher Ka and V bands. Rain fade is the most important issue in establishing reliable communication between Earth and satellites outside the 10 GHz band. The problem is exacerbated in the tropics by significant rainfall throughout the year. One way to deal with rainfall attenuation is to use a time-diversity strategy. Real-time rainfall attenuation data is needed to analyze time variability. However, data from higher frequency bands such as Ka and V bands cannot be used. As a result, the Synthetic Storm Technique (SST) was proposed to convert the measured real time rainfall data into rainfall attenuation data and predict the time diversity gain. The measured rainfall data was converted to rainfall attenuation data using the traditional SST method. Time diversity gains were predicted using Converted rainfall attenuation and the Matriciani model, and the measurements were significantly overestimated. A new concept of realtime rainfall with and without time delay is proposed and used to predict time diversity gain using ITU-R P. 618-13 and the measured rainfall distribution with delay. Therefore, the proposed method recommends using the measured long-term precipitation data to predict the gain from time diversity at the desired frequency.

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“…However, compact soils also caused by natural conditions without any biotic such as human and animal disturbance involvement (Batey, 2009). The environmental impacts were an inevitable of the prolonged such as floods and heavy rains which occurred during the North East Monsoon Season between November to February in the riparian forest of Malaysia (Ng, Singh & Thiruchelvam, 2018). According to An, Cheng, Sun, Wang and Li (2002); Balian and Naiman (2005) ;Tiegs, Leary, Pohl and Munill (2005), the distribution of riparian forest trees along the riverbanks area has been considered important in the river management and forest restoration.…”

Section: Introductionmentioning

confidence: 99%

Evaluation on Soil Hardness in Riparian Forest Restoration along Kayan Ulu River, Sarawak, Malaysia

Jaffar¹,

Wasli²,

Perumal³

2018

TUR

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Soil hardness plays a vital role in evaluating the physical properties of soil structure. With regards to the impact of compaction on practical forest management issues, most report and review forms were available. Thus, the aim of this study was to evaluate the soil condition in riparian forest restoration planted with indigenous species along Kayan Ulu River with special reference to soil hardness. Soil hardness was measured by using Hasegawa-type cone penetrometer from the surface soils to 100 cm depth, with a total of 48 random points for both study sites surveyed; restoration sites planted with Shorea macrophylla in year 1996 and 1998 (SPD96 and SPD98, respectively) for both on and between planting lines. Our findings indicated that, soil hardness in SPD98 was harder as compared to SPD96 at shallow depth presented in one drop penetrability. Likewise, soil penetration resistance on planting line in SPD98 was significantly higher than SPD96 at surface soils (0-20 cm) and subsurface soils (20-40 cm). A high number of strikes and soil penetration resistance indicate that the soils were highly compacted. However, there was no significant difference in term of soil penetration resistance between planting line. In order to avoid effects on tree productivity, it is recommended that in future, the evaluation of soil hardness should be determined during the early establishment for future restoration of riparian ecosystem.

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Performance analysis of 60-min to 1-min integration time rain rate conversion models in Malaysia

Cited by 9 publications

References 9 publications

Rain Attenuation Prediction Models in Microwave and Millimeter Bands for Satellite Communication System: A Review

Rain Attenuation Prediction Models in Microwave and Millimeter Bands for Satellite Communication System: A Review

Prediction of Time Diversity Gain – Comparison Between ITU-R P.618-13 Using a Concept of Rain Rate with Delay and Synthetic Storm Technique

Evaluation on Soil Hardness in Riparian Forest Restoration along Kayan Ulu River, Sarawak, Malaysia

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