nwsattrs

package module
v0.0.0-...-7966a6e Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jul 19, 2014 License: Apache-2.0 Imports: 17 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	IMGWIDTH           = 600
	IMGHEIGHT          = 550
	MILESPERPIXHEIGHT  = IMGHEIGHT
	NMPERDEGLATEQUATOR = 60.10774
)
View Source 
const (
	STORMCELLREG      = "[A-Z][0-9][ ]+[0-9]+/( *|[0-9])[0-9]+"
	MESOCELLREG       = "[0-9]+/[ ]*[0-9]+ +[0-9]?[0-9][L| ]"
	TVSCELLREG        = "[A-Z][0-9][ ]+[0-9]+/[ ]*[0-9]+"
	WARNINGFILEREGEXP = "warnings_[0-9]+_[0-9]+\\.txt"
)
View Source 
const (
	TORNREPORTURL = "http://www.spc.noaa.gov/climo/reports/today_torn.csv"
	WINDREPORTURL = "http://www.spc.noaa.gov/climo/reports/today_wind.csv"
	HAILREPORTURL = "http://www.spc.noaa.gov/climo/reports/today_hail.csv"
)
View Source 
const (
	NEW      WarningStatus = "O.NEW"
	EXPIRED                = "O.EXP"
	CONTINUE               = "O.CON"
	CANCEL                 = "O.CAN"
)
View Source 
const (
	WATCHREGEX      = "<strong>.*watch/ww(.*)\\.html"
	WATCHNUMREGEXP  = "WWP(.*)"
	LATLONREGEXP    = "[0-9]{8}"
	WATCHTYPEREGEXP = "\n\n(.*WATCH)"
	EXPIREREGEXP    = "- ([0-9]{6})Z"
)

Variables

View Source 
var Stations map[string]*StationLocation

var Stations map[string][]interface{}

Functions

func Bearing 

func Bearing(point, otherPoint IPoint) float64

func Contains 

func Contains(poly IPolygon, point IPoint) bool

func Distance 

func Distance(point, otherPoint IPoint) float64

func GetWarningTexts 

func GetWarningTexts(url string, number int) (warningTexts []string, err error)

Types

type Cache 

type Cache struct {
	Cacher

	*sync.Mutex
	// contains filtered or unexported fields
}

func NewCache 

func NewCache(c Cacher, cacheDuration time.Duration, timeToLive time.Duration) *Cache

func (*Cache) GetCachedData 

func (c *Cache) GetCachedData() (interface{}, bool, error)

func (*Cache) Reset 

func (c *Cache) Reset()

type Cacher 

type Cacher interface {
	GetLatest() (interface{}, error)
}

type CellData 

type CellData struct {
	StormCellData *StormCellData
	MesoCellData  *MesoCellData
	TvsCellData   *TvsCellData
}

type HailReport 

type HailReport struct {
	Report
	Size string
}

func GetHailReports 

func GetHailReports() (hailReports []HailReport, err error)

type HailReportsCacher 

type HailReportsCacher struct{}

func (HailReportsCacher) GetLatest 

func (rt HailReportsCacher) GetLatest() (interface{}, error)

type IPoint 

type IPoint interface {
	Degrees() LatLng
}

type IPolygon 

type IPolygon interface {
	//Needs to be a polygon that has the points in order to draw a polygon.
	//For instance, with four points, they would go: Nw Ne Se Sw to draw a rectangle
	GetPolygon() []LatLng
}

type IProductInfo 

type IProductInfo interface {
	ScanDuration() time.Duration
	GetDate() time.Time
	IsDue() bool
	IsOld() bool
}

type LatLng 

type LatLng struct {
	Lat, Lng float64
}

func Radians 

func Radians(point IPoint) LatLng

func (LatLng) Degrees 

func (ll LatLng) Degrees() LatLng

type LatLngBounds 

type LatLngBounds struct {
	Sw, Ne LatLng
}

func (*LatLngBounds) GetPolygon 

func (llb *LatLngBounds) GetPolygon() []LatLng

type MesoCell 

type MesoCell struct {
	StationId, Strength, StormId, LowLevelRotationalVelocity, LowLevelDeltaVelocity,
	Base, Depth, Hgt, StrmRelPercent, MaxRotationalVelocity, Msi, FcstDir, FcstSpeed string
	PointLatLng LatLng
	LatLng
	ProductTime time.Time
}

type MesoCellData 

type MesoCellData struct {
	Cells []MesoCell
	IProductInfo
}

type MovementVector 

type MovementVector struct {
	// contains filtered or unexported fields
}

type Mover 

type Mover interface {
	Movement() MovementVector
}

type ProductDescriptionBlock 

type ProductDescriptionBlock struct {
	Divider              int16 //-1
	LatitudeOfRadar      int32 //Latitude*1000, + is north
	LongitudeOfRadar     int32 //Longitude*1000, + is east
	HeightAboveSea       int16 //In Feet
	ProductCode          int16 //Radar Product Number
	OperationalMode      int16 // 0=Maintenance 1=Clear air, 2=Precipitation/Severe Weather
	VolumeScanPattern    int16 //RDA volume coverage pattern
	SequenceNumber       int16 // Sequence number of the request that generated the product
	VolumeScanNumber     int16 //Counter, cycles 1 to 80
	VolumeScanDate       int16
	VolumeScanTime       int32
	ProductGenDate       int16
	ProductGenTime       int32
	P1                   int16 //Product Specific Code
	P2                   int16 //Product Specific Code
	ElevNum              int16 //Elevation scan within volume scan
	P3                   int16
	DataThreshold        [32]byte //Data Thresholds 16, 2 byte halfwords
	P4                   int16
	P5                   int16
	P6                   int16
	P7                   int16
	P8                   int16
	P9                   int16
	P10                  int16
	NumberOfMaps         int16
	OffsetSymbologyBlock int32 //Number of halfwords (2 bytes) from start of product to block
	OffsetGraphicBlock   int32
	OffsetTabularBlock   int32
}

func (*ProductDescriptionBlock) GetProductGenDate 

func (pd *ProductDescriptionBlock) GetProductGenDate() time.Time

func (*ProductDescriptionBlock) GetVolumeScanDate 

func (pd *ProductDescriptionBlock) GetVolumeScanDate() time.Time

type RadarHeaderBlock 

type RadarHeaderBlock struct {
	MessageCode     int16
	Days            int16 //Number of days since 1 Jan 1970
	MidnightHours   int32 // Number of seconds since midnight
	LengthOfMessage int32
	SourceID        int16
	DestinationID   int16
	NumberOfBlocks  int16
	ProductDescriptionBlock
}

func GetRadarHeader 

func GetRadarHeader(data []byte) (*RadarHeaderBlock, error)

func (*RadarHeaderBlock) GetDate 

func (rh *RadarHeaderBlock) GetDate() time.Time

func (*RadarHeaderBlock) IsDue 

func (rh *RadarHeaderBlock) IsDue() bool

func (*RadarHeaderBlock) IsOld 

func (rh *RadarHeaderBlock) IsOld() bool

func (*RadarHeaderBlock) ScanDuration 

func (rh *RadarHeaderBlock) ScanDuration() time.Duration
	Source wikipedia https://en.wikipedia.org/wiki/NEXRAD
	about Volume Coverage Patterns (VCP)
	11: Has the best overall volume converage
	211: Improves range-obscured velocity data over VCP 11
	12: Focuses on lower elevations to better sample the lower levels of storms.
	212: Improves range-obscured velocity data over VCP 12
	121: Scans lower cuts multiple times with varying pulse repetition to greatly
		 enhance velocity data
    21: Rarely used for convenction due to sparse elevation data and long completion time
	221: Improves range-obscured velocity data over VCP 121
	31: Long-pulse
	32: Short-pulse

type RadarStation 

type RadarStation struct {
	Id                      string
	LeftEdgeLon, TopEdgeLat float64
	LatLng
	// contains filtered or unexported fields
}

func NewRadarStation 

func NewRadarStation(stationId string) (*RadarStation, error)

func (RadarStation) Degrees 

func (rs RadarStation) Degrees() LatLng

func (RadarStation) GetLatest 

func (rs RadarStation) GetLatest() (interface{}, error)

This will retrieve all of the station's storm cell data and return it as a celldata this will implement the Cacher interface

func (*RadarStation) ParseMesoCells 

func (rs *RadarStation) ParseMesoCells() (*MesoCellData, error)

func (*RadarStation) ParseStormCells 

func (rs *RadarStation) ParseStormCells() (*StormCellData, error)

TODO: Maybe include the radar status message? from http://weather.noaa.gov/pub/SL.us008001/DF.of/DC.radar/DS.75ftm/

func (*RadarStation) ParseTvsCells 

func (rs *RadarStation) ParseTvsCells() (*TvsCellData, error)

type Report 

type Report struct {
	Time     time.Time
	Location string
	County   string
	State    string
	*LatLng
	Comments string
	SpecAttr string `json:"-"`
}

func GetReports 

func GetReports(reportUrl string) (reports []Report, err error)

type SortByWarningName 

type SortByWarningName []Warning

func (SortByWarningName) Len 

func (w SortByWarningName) Len() int

func (SortByWarningName) Less 

func (w SortByWarningName) Less(i, j int) bool

func (SortByWarningName) Swap 

func (w SortByWarningName) Swap(i, j int)

type StationLocation 

type StationLocation struct {
	LatLng
	LatLngBounds
}

type StormCell 

type StormCell struct {
	CellId, StationId, Az, Ran, Tvs, Meso, Posh, Poh, MaxSize,
	Vil, VilDensity, MaxDbz, Hgt, Top, FcstDir, FcstSpeed string
	PointLatLng LatLng
	LatLng
	ProductTime time.Time
}

type StormCellData 

type StormCellData struct {
	Cells []StormCell
	IProductInfo
}

type TornadoReport 

type TornadoReport struct {
	Report
	FScale string
}

func GetTornadoReports 

func GetTornadoReports() (tornadoReports []TornadoReport, err error)

type TornadoReportsCacher 

type TornadoReportsCacher struct{}

func (TornadoReportsCacher) GetLatest 

func (rt TornadoReportsCacher) GetLatest() (interface{}, error)

type TvsCell 

type TvsCell struct {
	StationId, StormId, AverageDeltaVelocity, LowLevelDeltaVelocity, MaxDeltaVelocity, Hgt,
	Depth, Base, Top, MaxShear string
	LatLng
	ProductTime time.Time
}

type TvsCellData 

type TvsCellData struct {
	Cells []TvsCell
	IProductInfo
}

type Warning 

type Warning struct {
	ExpireTime                            string
	WarningName, WarningType, Description string
	Polygon                               []LatLng
}

func GetNWSWarnings 

func GetNWSWarnings() []Warning

func (Warning) GetPolygon 

func (w Warning) GetPolygon() []LatLng

type WarningCache 

type WarningCache struct{}

func (WarningCache) GetLatest 

func (wc WarningCache) GetLatest() (interface{}, error)

type WarningStatus 

type WarningStatus string

func GetWarningStatus 

func GetWarningStatus(text string) WarningStatus

type Watch 

type Watch struct {
	Type        string
	Description string
	Polygon     []LatLng
	ExpireTime  string
}

func GetNWSWatches 

func GetNWSWatches() []Watch

func (Watch) GetPolygon 

func (self Watch) GetPolygon() []LatLng

type WatchCache 

type WatchCache struct{}

func (WatchCache) GetLatest 

func (w WatchCache) GetLatest() (interface{}, error)

type WindReport 

type WindReport struct {
	Report
	Speed string
}

func GetWindReports 

func GetWindReports() (windReports []WindReport, err error)

type WindReportsCacher 

type WindReportsCacher struct{}

func (WindReportsCacher) GetLatest 

func (rt WindReportsCacher) GetLatest() (interface{}, error)

Source Files

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