STK Components for .NET 2017 r2

## Welcome |

STK Components for .NET is a family of powerful class libraries built on version 2.0 or later of the Microsoft .NET platform. Whether you are building a small utility to process some proprietary data, a world-class desktop aerospace software application, a multi-user web application, or a piece of a service-oriented architecture (SOA), STK Components can help.

Important |
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In the upcoming 2017r3 release, the .NET version of STK Components will begin requiring .NET 4.5 or above, in contrast to our current requirement of .NET 2.0 or above. For questions or concerns please contact support@agi.com. |

Important |
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In the upcoming 2017r3 release, the 32-bit version of Insight3D will be discontinued. Insight3D will be 64-bit only. Note that all other analysis libraries have always been independent of architecture and will be unaffected. For questions or concerns please contact support@agi.com. |

Capabilities

The libraries in STK Components offer the following major capabilities:

**Time**A high-precision JulianDate type

Time standards, including UTC, UT1, TAI, TT, TDB, and GPS, and conversions between them

**Coordinates**Cartesian, Spherical, Cartographic (Longitude, Latitude, Altitude), and more

Orbital elements including Delaunay, Equinoctial, Keplerian, and Modified Keplerian

**Rotations**Matrix3By3, UnitQuaternion, EulerSequence, YawPitchRoll, and more

**Earth Modeling**Earth Orientation Parameters (Pole Wander and UTC/UT1 difference)

IAU 1976 precession model

IAU 1980 nutation model

IERS Technical Note 21

J2000, Mean Equator Mean Equinox, Mean Ecliptic Mean Equinox, Mean Ecliptic True Equinox, True Equator True Equinox, True Equator Mean Equinox, Fixed

**Modeling of Other Central Bodies**IAU 2000, 2006 and 2009 models of the orientation of the planets, Sun, and Earth's Moon

Simon1994 analytical model for the positions of the planets and Earth's Moon

**Geometry Transformation Engine (like STK's Vector Geometry Tool)**Points, Axes, Vectors, Reference Frames, and Scalar

Observe a point in any reference frame

Observe a vector in any set of axes

Find a transformation between any two sets of axes or reference frames

**Orbit Propagation**Two Body, J2, and J4 propagators

Propagate from a Two-Line Element Set (TLE) using SGP4

Long-term propagation to determine expected orbit decay time using LifetimeOrbitPropagator.

NavstarISGps200DPropagator for propagating GPS satellites according to IS-GPS-200D

Multithreaded for scalability and to take full advantage of multicore systems

Stop propagating after a fixed amount of time or on arbitrary events

**Numerical Propagation**Propagate a state from initial conditions using derivatives

Propagate state using SRP, drag, gravity and custom force models with NumericalPropagator. -

*requires Orbit Propagation Library*

**Ballistic Propagation**Ballistic propagation to and from fixed points on a CentralBody

Calculate trajectories to satisfy:

Minimum energy

Minimum eccentricity

Specified delta-V

Specified flight duration

Specified apogee altitude

**Waypoint Propagation**Shortest path over an ellipsoid

Useful for modeling straight paths between waypoints on the surface of a CentralBody

**Route Propagation**-*requires Route Design Library*Provides a simple way to model aircraft, ground vehicle, and ship routes

Simple turn procedures at waypoints

Holding patterns and search procedures

Takeoff and landing

Simple orientation for modeling aircraft banking and vehicles driving along terrain

**Segment Propagation**-*requires Segment Propagation Library*Provides a simple way to model a trajectory where the means of propagation changes

Propagate any number and combination of state elements

Use a numerical or analytical propagator that stops at arbitrary events

Apply impulsive maneuvers with fuel usage -

*requires Orbit Propagation Library*Group individual segments together in a list that is itself a segment

Solve for a particular trajectory by modifying the segments settings

Control the flow of propagation with stopping conditions, returning out of a list, or stopping propagation

Follow other propagation elements before starting another segment

Hold propagation elements constant until a condition is satisfied

Apply discrete updates to state elements

**Automatic Route Generation**-*requires Route Design Library and Auto-Routing Library*Observe target points

Exhaustively search regions

Avoid cordon regions

Terrain avoidance

**Sensor Modeling**Rectangular, Complex Conic, Synthetic Aperture Radar (SAR)

Compute Access using a sensor

Find the projection of a sensor onto the Earth or other central body

**Access (intervisibility)**Determine the times when one object can "see" another

Model complex intervisibility problems involving any number of objects by building access queries using boolean operators

Accounts for light-time delay and aberration, even over multiple "hops" in a chain

Multithreaded for scalability and to take full advantage of multicore systems

**JPL Planetary and Lunar Ephemerides**Determine the positions and velocities of the planets and Earth's Moon

Nutation and libration

**Numerical Methods**Numerical integration

Brent bracketing root and extremum finders

Find the places where an arbitrary function crosses a threshold value

Lagrange and Hermite interpolation/extrapolation

Translational and rotational motion interpolators

Polynomial modeling and root finding

Solve multivariable functions with a multithreaded Newton-Raphson method

**Platforms**Extensible, high-level objects for modeling satellites, facilities, aircraft, etc.

**3D Visualization**-*requires Insight3D*High performance, technically accurate 3D globe

Rich terrain and imagery

Render moving points, lines, polygons, meshes, markers and models

Screen overlays for heads-up displays, logos, etc.

Display video on terrain, screen overlays, and models

Rich image processing

Flexible camera control

**Dynamic Data Analysis**-*requires Tracking Library*Software Transactional Memory System

Evaluator Parameterization for one-point analysis

Data Filtering

Archiving and Retrieval

**Navigation Systems**-*requires Navigation Accuracy Library*Read Performance Assessment Files (PAF), Prediction Support Files (PSF), RINEX Navigation files, Satellite Outage Files (SOF), SEM and YUMA almanacs, and SP3a and SP3c ephemeris files

Propagate the SVs according to IS-GPS-200D

Track satellites with All-in-view and Best-N algorithms

Compute Dilution of Precision (DOP)

Compute assessed and predicted navigation accuracy

Compute Receiver Autonomous Integrity Monitoring (RAIM) outages

Use navigation quantities to constrain access

**Navigation Communications**-*requires Navigation Accuracy Library, the Communications Library and the Navigation Advanced Library*GPS signal transmitters for all current GPS satellite blocks

Multiple receiver channels, each capable of tracking multiple signals

Direct or handover acquisition models(C/A or C/A to P(Y) for example)

Constrain receiver channel tracking by C/N0 values

Supports addition of interference and jamming transmitters

GPS specific link budgets

Noise calculations for single or dual frequency GPS receivers

GPS signal power spectral density models

Modern signal architectures included (C code, M code)

Standard constellation and receiver models included

User settable engineering parameters and antenna gain patterns

**Terrain Analysis**-*requires Terrain Analysis Library*Read terrain data in a variety of formats:

USGS Digital Elevation Model (DEM)

NGA Digital Terrain Elevation Data (DTED)

AGI World Terrain

GEODAS Gridded Data Format (GRD98)

GTOPO30

AGI Processed Data Terrain (PDTT)

Earth Gravity Model 1996 (EGM96) Mean Sea Level surface

Terrain line of sight Access constraint

Compute an Azimuth/Elevation Mask from terrain

Multithreaded caching mechanism delivers great performance even with huge data sets

**Spatial Analysis / Coverage**-*requires Spatial Analysis Library*Geometry primitives representing lines and regions on the globe

Gridding Algorithms

Grid based on surface regions (e.g. area defined by the US border)

Global grid

Latitude and Longitude lines

Latitude bounds

Downselect an existing grid with a surface region (area target)

Create your own by extending STK Components types

Easily orient and configure constraints on the grid points for Access

Use terrain to specify grid point altitudes

Coverage Definitions

Coverage based on a grid on the surface of a CentralBody

Coverage based on a time-dynamic object

Assets representing spacecraft, aircraft, constellations, chains, or any boolean combination thereof

Figures of Merit

Number of assets

Coverage time

Response time

Coverage gaps

Percentages and statistics over the grid

Instantaneous and/or accumulated values

Navigation Figures of Merit -

*requires Navigation Accuracy Library*Dilution of precision

Navigation accuracy predicted

Navigation accuracy assessed

**Communications Analysis**-*requires Communications Library*Wireless links and support for Platforms used as antennas

Antenna Gain Patterns

Isotropic Gain Pattern (omnidirectional)

Gaussian Gain Pattern

Helical Gain Pattern

Parabolic Gain Pattern

Square Horn Gain Pattern

Wireless Signal Propagation

Light time delay and doppler shift taken into account for signal propagation

Free Space Path Loss

Atmospheric Attenuation from ITU-R P.676

Cloud and Fog Attenuation from ITU-R P.840

Rain Attenuation from ITU-R P.618

Tropospheric Scintillation from ITU-R P.618

Simple SATCOM Attenuation Model

Crane Rain Attenuation Model

Signal Processors Modeling Hardware Behavior

Constant Gain Amplifier

Variable Gain Amplifier (IBO/OBO)

Constant Frequency Mixer

Variable Frequency Mixer

Signal Source (analog/custom)

Digital Data Source (digital)

Digital Modulator

Digital Demodulator

Rectangular Filter

Scalars Representing Link Budget Parameters

Effective Isotropic Radiated Power - EIRP

Received Isotropic Power - RIP

Carrier to Noise - C/N

Carrier to Noise Density - C/No

Carrier to Interference - C/I

Carrier to Noise + Interference - C/(N+I)

Energy per Bit to Noise Density - Eb/No

Bit Error Rate - BER

Antenna Gain in Link Direction

Power at Receiver Output

Received Power Flux Density

Propagation Loss

The above Scalars can be used as AccessConstraints and FiguresOfMerit

Access Constraints can be used to constrain Comm. Links during signal propagation

The above list is only a sampling of the capabilities offered by STK Components.
For a complete listing, browse the table of contents of the
Library Reference.
If you are an experienced
.NET
developer, you can get started with STK Components right away simply by adding references to its
assemblies
to your project. They are found in the
*Assemblies*
subdirectory under the directory where you installed STK Components.

In addition to the Library Reference, the help system includes a Programmer's Guide, with high level descriptions and explanations of the class library, Example Applications illustrating the use of important STK Components types, a Tutorial, and other information.