README
¶
前言
- Forked from joshuaferrara/go-satellite
- 原仓库协议：BSD 2-Clause License
- 原 repo 的浮点数计算可能存在精度问题，所以新建一个用新的方式计算部分浮点数
- 在原有基础上 可能做出部分修改，HamZone.cn 相关 TLE 计算会使用此仓库，方便自主调整
- 仓库内容中文本土化
master分支保持和原仓库一致，emin为默认分支
TLESatellite
import "github.com/HamZone/TLESatellite"`
项目使用 SGP4 模型进行预测
用法
Constants
func ECIToLLA
func ECIToLLA(eciCoords Vector3, gmst float64) (altitude, velocity float64, ret LatLong)
Convert Earth Centered Inertial coordinated into equivalent latitude, longitude, altitude and velocity. Reference: http://celestrak.com/columns/v02n03/
func GSTimeFromDate
func GSTimeFromDate(year, mon, day, hr, min, sec int) float64
Calc GST given year, month, day, hour, minute and second
func JDay
func JDay(year, mon, day, hr, min, sec int) float64
Calc julian date given year, month, day, hour, minute and second the julian date is defined by each elapsed day since noon, jan 1, 4713 bc.
func Propagate
func Propagate(sat Satellite, year int, month int, day, hours, minutes, seconds int) (position, velocity Vector3)
Calculates position and velocity vectors for given time
func ThetaG_JD
func ThetaG_JD(jday float64) (ret float64)
Calculate GMST from Julian date. Reference: The 1992 Astronomical Almanac, page B6.
type LatLong
type LatLong struct {
Latitude, Longitude float64
}
Holds latitude and Longitude in either degrees or radians
func LatLongDeg
func LatLongDeg(rad LatLong) (deg LatLong)
Convert LatLong in radians to LatLong in degrees
type LookAngles
type LookAngles struct {
Az, El, Rg float64
}
Holds an azimuth, elevation and range
func ECIToLookAngles
func ECIToLookAngles(eciSat Vector3, obsCoords LatLong, obsAlt, jday float64) (lookAngles LookAngles)
Calculate look angles for given satellite position and observer position obsAlt in km Reference: http://celestrak.com/columns/v02n02/
type Satellite
type Satellite struct {
Line1 string
Line2 string
}
Struct for holding satellite information during and before propagation
func ParseTLE
func ParseTLE(line1, line2, gravconst string) (sat Satellite)
Parses a two line element dataset into a Satellite struct
func TLEToSat
func TLEToSat(line1, line2 string, gravconst string) Satellite
Converts a two line element data set into a Satellite struct and runs sgp4init
type Vector3
type Vector3 struct {
X, Y, Z float64
}
Holds X, Y, Z position
func ECIToECEF
func ECIToECEF(eciCoords Vector3, gmst float64) (ecfCoords Vector3)
Convert Earth Centered Intertial coordinates into Earth Cenetered Earth Final coordinates Reference: http://ccar.colorado.edu/ASEN5070/handouts/coordsys.doc
func LLAToECI
func LLAToECI(obsCoords LatLong, alt, jday float64) (eciObs Vector3)
Convert latitude, longitude and altitude into equivalent Earth Centered Intertial coordinates Reference: The 1992 Astronomical Almanac, page K11.
Documentation
¶
Index ¶
- Constants
- func DecimalAdd2(d1, d2 float64) float64
- func DecimalAdd3(d1, d2, d3 float64) float64
- func DecimalDiv2(d1, d2 float64) float64
- func DecimalMul2(d1, d2 float64) float64
- func DecimalMul3(d1, d2, d3 float64) float64
- func DecimalMul4(d1, d2, d3, d4 float64) float64
- func DecimalSub2(d1, d2 float64) float64
- func DecimalSub3(d1, d2, d3 float64) float64
- func DecimalSub4(d1, d2, d3, d4 float64) float64
- func GSTimeFromDate(year, mon, day, hr, min, sec int) float64
- func JDay(year, mon, day, hr, min, sec int) float64
- func ThetaG_JD(jday float64) (ret float64)
- type DSComResults
- type DeepSpaceInitResult
- type DeepSpaceResult
- type DpperResult
- type GravConst
- type LatLong
- type LookAngles
- type Satellite
- type Vector3
Constants ¶
const DEG2RAD float64 = math.Pi / 180.0
const RAD2DEG float64 = 180.0 / math.Pi
const TWOPI float64 = math.Pi * 2.0
Constants
const XPDOTP float64 = 1440.0 / (2.0 * math.Pi)
Variables ¶
This section is empty.
Functions ¶
func DecimalSub3 ¶ added in v0.0.4
DecimalSub3 d1 - d2 - d3
func DecimalSub4 ¶ added in v0.0.4
DecimalSub4 d1 - d2 - d3 - d4
func GSTimeFromDate ¶
GSTimeFromDate 计算Greenwich Mean Sidereal Time 格林威治平均恒星时 Calc GST given year, month, day, hour, minute and second
Types ¶
type DSComResults ¶
type DSComResults struct {
// contains filtered or unexported fields
}
A struct returned from the dscom function
type DeepSpaceInitResult ¶
type DeepSpaceInitResult struct {
// contains filtered or unexported fields
}
A struct returned from the dsinit function
type DeepSpaceResult ¶
type DeepSpaceResult struct {
// contains filtered or unexported fields
}
A struct returned from the dspace function
type DpperResult ¶
type DpperResult struct {
// contains filtered or unexported fields
}
A struct returned from the dpper function
type GravConst ¶
type GravConst struct {
// contains filtered or unexported fields
}
GravConst 重力模型的一些变量 Holds variables that are dependent upon selected gravity model
type LatLong ¶
type LatLong struct {
Latitude, Longitude float64
}
Holds latitude and Longitude in either degrees or radians
func ECIToLLA ¶
ECIToLLA 将地心惯性坐标转换为等效的纬度(latitude)、经度(longitude)、高度(altitude)和速度(velocity) Convert Earth Centered Inertial coordinated into equivalent latitude, longitude, altitude and velocity. Reference: http://celestrak.com/columns/v02n03/
func LatLongDeg ¶
LatLongDeg 将以弧度表示的LatLong转换为以度表示的LatLong Convert LatLong in radians to LatLong in degrees
type LookAngles ¶
type LookAngles struct {
Az, El, Rg float64
}
Holds an azimuth, elevation and range
func ECIToLookAngles ¶
func ECIToLookAngles(eciSat Vector3, obsCoords LatLong, obsAlt, jday float64) (lookAngles LookAngles)
ECIToLookAngles 计算给定卫星位置和观察者位置的视角 Calculate look angles for given satellite position and observer position obsAlt in km Reference: http://celestrak.com/columns/v02n02/
type Satellite ¶
type Satellite struct {
Line1 string
Line2 string
Error int64
ErrorStr string
// contains filtered or unexported fields
}
Struct for holding satellite information during and before propagation
type Vector3 ¶
type Vector3 struct {
X, Y, Z float64
}
Holds X, Y, Z position
func ECIToECEF ¶
ECIToECEF 将地心间坐标转换为地心最终坐标 Earth Centered Intertial Convert Earth Centered Intertial coordinates into Earth Cenetered Earth Final coordinates Reference: http://ccar.colorado.edu/ASEN5070/handouts/coordsys.doc
Source Files