Community Profile # Darin Koblick

### California State University and Claremont Graduate University

Last seen: 2 months ago Active since 2010

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Submitted

KeplerMinMax
A novel closed-form solution to compute the surface altitude extrema for any two-body orbit Submitted

Convert ECI to ECEF Coordinates
Transform ECI position, velocity and acceleration to ECEF position, velocity & acceleration. Submitted

Calculate if an Angle is Between Two Angles
This routine will check whether an angle is contained between two other angles specifying lower and upper bounds. Submitted

Generate an Array of Random Strings
Want to generate a password with specific upper/lower case and wild character requirements? Perhaps quickly determine a unique ... Submitted

Peak and Threshold SNR given an Average False Alarm Rate
Determine the Peak SNR Needed to achieve a desired False Alarm Rate at a Specific Probability of Detection and pulse duration in... Submitted

Vectorized Multi-Dimensional Matrix Multiplication
Take Any N-D Matrix and Multiply it by another N-D Matrix Without a For-Loop Submitted

Vectorized Orbital Decay Routine For Space Objects Between 180 and 500 km Altitude.
Fully vectorized routine will estimate the decay time for Earth orbiting objects Submitted

rotVecAroundArbAxis(unitVec2Rotate,rotationAxisUnitVec,theta)
Vectorized 3-D rotation of any vector around an arbitrary axis Submitted

Vectorized Diagonal of any Multi-Dimensional Matrix
Given an N-D matrix, this routine will return the diagonal elements of any two dimensions

Submitted

Parallel Implementation of the Picard Iteration For Linear BVP PDEs
Parallel Picard Iteration for a Linear Hyperbolic BVP PDE Submitted

Efficient Vector Rotation Matrix Routine
Efficient Method to Determine a Matrix Needed to Rotate One Vector to Another

Submitted

Convert Keplerian Orbital Elements to a State Vector
Convert orbital elements to a state vector, or a state vector back to orbital elements. Submitted

Vectorized Solar Azimuth and Elevation Estimation
Predict the topocentric solar position defined by geodetic lat, lon, Alt, and a universal time Submitted

2000 ASTM Standard Extraterrestrial Spectrum Reference E-490-00
Vectorized MATLAB code which will compute the solar flux given a wave length. Submitted

Vectorized Clohessy-Wiltshire Hill Linear Propagation
A Demonstration of Linear Satellite Orbit Propagation Using Clohessy-Wiltshire Equations of Motion. Submitted

Flatten Any Mulitdimensional Matrix into a 2-D Matrix!
Convert any multidimensional matrix into a 2-D Matrix. Then convert it back to its original form.

Submitted

Vectorized Picard-Chebyshev Method
Vectorized Picard-Chebyshev Method used for the analysis of the 2012 ASME Conference paper 87878 Submitted

State Vector Warping Routine
Calculate new ECI vectors corresponding to a desired time while fixing their relative earth position Submitted

Convert Julian Date to Greenwich Apparent Sidereal Time
Find the Greenwich Apparent Sidereal Time Given any Julian Date

Submitted

Gauss-Jackson Eighth-Order ODE Solver (Fixed Step Size)
Gauss-Jackson Eight-Order MultiStep Predictor-Corrector using ODE113 in its startup procedure. Submitted

Vectorized Analytic Two Body Propagator (Kepler Universal Variables)
Analytic propagation routine uses universal variables to solve a single formula for all orbit types Submitted

Convert ECEF to ECI Coordinates
Take any vector or series of vectors in the ECEF Coordinate frame and convert them to ECI. Submitted

Convert UTC to Solar Apparent Time
Convert a time given in UTC to Solar Apparent or Solar Mean Time

Submitted

Equation of Time
Compute the equation of time with accuracy on the order of seconds. Submitted

Bulirsch-Stoer Propagator/Integrator
Implementation of the Bulirsch-Stoer algorithm for purposes of numerical orbit propagation. Submitted

Lunar Azimuth and Altitude Estimation Algorithm
Predict the Lunar Azimuth and Altitude within +/- .2 deg of any lat and lon for a given UTC Submitted

Julian Date to Greenwich Mean Sidereal Time
Convert a given Julian Date to Greenwich Mean Sidereal Time (GMST) in degrees.

Submitted

Convert Right Ascension and Declination to Azimuth and Elevation
Algorithm will convert topocentric RA/DEC Angles to Azimuth and Elevation