weather: Retrieval of Weather Data from WMO and NASA Surface...

In gowusu/sebkc: The Surface Energy Balance and Crop Coefficient Estimation with R

Retrieval of Weather Data from WMO and NASA Surface meteorology and Solar Energy

Description

The function retrieves weather data from the World Meteorological Organization and NASA SSE. The retrieval is based on airports IATA or ICAO codes or WMO weather station codes. The actual WMO data is from Weather Underground . Internet connection is therefore needed before data can be accessed

Usage

weather(data = NULL, wmo = NULL, airport = NULL, date = "YYYY-m-d",
  time = NULL, latitude = NULL, longitude = NULL, NASA.SSE = list(from =
  "YYYY-m-d", to = "YYYY-m-d"), folder = NULL)

Arguments

data	dataframe that can contain all or part of the input data
wmo	numeric. World Meteorological Organization weather station code. You can use the Worldwide Station List at https://www.wunderground.com/about/faq/international_cities.asp [Accessed on 2016-5-6] or http://www.wetterzentrale.de/klima/stnlst.html [Accessed on 2016-5-6]
airport	numeric. IATA or ICAO code. They are alphabetically listed at https://en.wikipedia.org/wiki/List_of_airports_by_IATA_code:_A [Accessed on 2016-5-6]
date	date in the form of "YYYY-mm-dd" for example "2016-01-01"
time	time in the form of "H:M" or decimal hours only. For example "14:21" or 14.35
latitude	geographical coordinates in decimal degrees. It should be negative for southern hemisphere
longitude	The longitude of the measurement site i.e. geographical coordinates in decimal degrees for the weather station. It should be negative for West and positive for East.
NASA.SSE	list of NASA SSE data dates in the form of "YYYY-mm-dd". For example NASA.SSE=list(from=""2001-01-01"", to="2001-04-01"). Note that SSE date is from 1983 to 2005: https://eosweb.larc.nasa.gov/cgi-bin/sse/sse.cgi?[e-mail]+s01#s01 [Accessed on 2016-5-6] if the parameter is not provided, date parameter will be used provided longitude and latitude are provided.
folder	The path of the folder where the data can be written.

Value

WMO and NASE.SSE. The WMO contains hour and day data. The NASE.SSE contains meta and data. See example below.

Author(s)

George Owusu

References

• Worldwide Station List.http://www.wetterzentrale.de/klima/stnlst.html [Accessed on 2016-5-6]

• List of airports by IATA code. https://en.wikipedia.org/wiki/List_of_airports_by_IATA_code [Accessed on 2016-5-6]

• Weather Underground https://www.wunderground.com/ [Accessed on 2016-5-6]

Examples

## Not run: 
#all hours data at Lincoln Airport, Nabraska
lincoln=weather(airport = "KLNK", date="2011-08-04")
lincoln$WMO$hour
lincoln$WMO$day
#current hour data at London
london.now=weather(airport = "LON", date=format(Sys.time(), "%Y-%m-%d"),
time=format(Sys.time(), "%H:%M"))
london.now$WMO$hour
#NASA SSE data for Kumasi, Ghana
kumasi=weather(longitude = -1.5,latitude = 6.7,NASA.SSE = list(from="2001-04-01",
to="2002-04-01"))

#Hour, daily and SSE data at JFK 
JFK=weather(airport = "JFK", date="2001-02-02",time="17:20", latitude=40.6413, 
longitude=73.7781)
JFK$WMO$hour
JFK$WMO$day
JFK$NASA.SEE$data
JFK$NASA.SEE$meta

#' #Hour, daily and SSE slice data at Kotoka International Airport, ACCRA 
accra=weather(airport = "ACC", date="2001-02-02",time="17:20", latitude=40.6413, longitude=73.7781, 
NASA.SSE=list(from="2001-01-01",to="2004-01-01"))
accra$WMO$hour
accra$WMO$hour
accra$NASA.SEE$data
accra$NASA.SEE$meta

#Using wmo code
kumasi.now=weather(wmo="65442", date=format(Sys.time(), "%Y-%m-%d"),time=format(Sys.time(), 
"%H:%M"))
kumasi.now$WMO$hour

#retrieve daily data for a specific period i.e 1 month
lincoln=weather(airport = "KLNK", date=c("2011-08-04","2011-09-04"))
#kumasi and accra data for a time slice. May not work for different 
geographical regions due different nummber of paramters. Write the results to a file
accrakumasi=weather(airport ="ACC", date=c("2011-08-04","2011-10-04"),
folder="C:/Users/george/Documents/")

## End(Not run)

gowusu/sebkc documentation built on July 28, 2023, 11:44 a.m.