scholarly journals On applicability of Frontier Regression to nowcast surface meteorological parameters at Chennai and Trichy airports in Tamilnadu

MAUSAM ◽  
2021 ◽  
Vol 51 (4) ◽  
pp. 319-328
Author(s):  
R. SURESH ◽  
K. SURESH CHANDRA ◽  
N. SIVAGNANAM
Keyword(s):  
Meteorological Parameters ◽  
Coastal Station ◽  
Statistical Forecasting ◽  
Flight Planning

An advanced statistical forecasting technique, viz., Frontier regression (FR) has been explored to augment the forecasting capacity in nowcasting of meteorological parameters for aviation flight planning at Chennai airport. As maritime effects strongly influence weather over a coastal station like Chennai, the model contemplated in this study has been tried for an inland airport station, viz., Trichy also to assess its efficacy.

scholarly journals Forecasting maximum and minimum temperature over airports with special relevance to aviation in flight planning

MAUSAM ◽  
2021 ◽  
Vol 50 (2) ◽  
pp. 121-128
Author(s):  
R. SURESH
Keyword(s):  
Kalman Filtering ◽  
Adaptive Filtering ◽  
Minimum Temperature ◽  
Maximum Temperature ◽  
Coastal Station ◽  
Flight Planning ◽  
Hot Weather ◽  
Auto Regression ◽  
Special Relevance ◽  
Better Than

Forecasting of maximum temperature and minimum temperature for aviation and non-aviation purpose has been attempted through auto regression and by employing the method of adaptive filtering and Kalman filtering during the hot weather season (March to May) over Madras. The filtering techniques have been outlined and the results are compared with the method of climatology and persistence. The Kalman filter using the model output of adaptive filtering. forecasts well the day-to-day variability of maximum and minimum temperature during hot weather season over Madras with an efficiency close to 90%. As the model performs reasonably well over Madras. a coastal station. the same has been tried over Trichy (300 km southwest of Madras), an inland airport station in Tamilnadu to ascertain its efficacy. The efficiency is better than 90% in predicting maximum and minimum temperature within an accuracy of 2°C).

scholarly journals Climatic Variation at Thumba Equatorial Rocket Launching Station, India

2013 ◽  
Vol 2013 ◽  
pp. 1-16
Author(s):  
K. V. S. Namboodiri ◽  
P. K. Dileep ◽  
Koshy Mammen
Keyword(s):  
Climate Change ◽  
Arabian Sea ◽  
Meteorological Parameters ◽  
Climatic Variation ◽  
Coastal Station ◽  
North East ◽  
South West ◽  
Time Domains ◽  
First Time

Long-term (45 years) diversified surface meteorological records from Thumba Equatorial Rocket Launching Station (TERLS), India, were collected and analysed to study the long-term changes in the overall climatology, climatology pertained to a particular observational time, mean daily climatology in temperature, inter-annual variability in temperature, interannual variability in surface pressure, and rainfall for the main Indian seasons—South West and North East monsoons and inter-annual mean monthly anomaly structure in temperature. Results on various analyses show strong and vivid features contributed by climate change for this South Peninsular Indian Arabian Sea Coastal Station, and this paper may be a first time venture which discusses climate change imparted perturbations in several meteorological parameters in different time domains, like a specific time, daily, monthly, and interannually over a station. Being a coastal rocket launching station, climatic change information is crucial for long-term planning of its facilities as well as for various rocket range operational demands.

THE IMPACT OF METEOROLOGICAL PARAMETERS ON SULPHURIC AIR POLLUTION IN KOHTLA-JÄRVE

Oil Shale ◽  
2011 ◽  
Vol 28 (2) ◽  
pp. 337
Author(s):  
J PAVLENKOVA ◽  
M KAASIK ◽  
E-S KERNER ◽  
A LOOT ◽  
R OTS
Keyword(s):  
Air Pollution ◽  
Meteorological Parameters ◽  
The Impact

The Visibility of Stars during Twilight

1957 ◽  
Vol 10 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Peter M. Millman
Keyword(s):  
Magnetic Compass ◽  
The Arctic ◽  
Relative Importance ◽  
The Moon ◽  
Heavenly Body ◽  
Flight Planning ◽  
Arctic Navigation

One of the problems in arctic navigation by astro is the twilight period. At this time, if the Moon is below the horizon, suitable objects for sextant observation are not easy to find. The difficulty is aggravated by the fact that on certain flight paths the arctic twilight may last for many hours. It must also be remembered that in these areas the behaviour of the magnetic compass and of radio aids are often unreliable and this increases the relative importance of astro-navigation. With the introduction of the periscopic sextant into air navigation it has become possible to pre-set the instrument for a given star or planet and satisfactory observations may be possible when the heavenly body is still below the level of casual perception for the unaided eye. In this connection it is necessary to know what stars are likely to be seen under twilight conditions if efficient flight-planning is to be carried out.

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