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Questions tagged [stk-agi]

STK is the Systems Tool Kit (former Satellite Tool Kit) software from Analytical Graphs Inc. (AGI). Questions about STK usage, functionality, applications and features should have this tag.

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How can I get longitude of ascending node from satellite TLEs with Right Ascension of Ascending Node (RAAN)?

As the title says, the TLEs contains RAAN, from which I want to get the longitude of ascending node, as defined in the STK help file as shown in the figure. Is there an open source tool for python to ...
user47758's user avatar
4 votes
2 answers
427 views

SGP4 on Systems Tool Kit (STK); how to check if SDP4 deep space correction is implemented?

I am doing orbit propagation for a geostationary satellite which requires the deep space corrections of SDP4. See my previous question SGP 4 for Geostationary Satellite. I am using SGP4 on STK, but, ...
Elisa Fitri's user avatar
4 votes
1 answer
202 views

How can I extend EOP data beyond the last prediction epoch?

I have an EARTH ORIENTATION PARAMETERS (EOP) DATA file taken from CelesTrak to convert data from ECI to ECEF. The same file used by STK for the Scenario to be clear. However its predictions stop at ...
Frank's user avatar
  • 315
4 votes
1 answer
2k views

Generating TLEs with STK Using SGP4 Propagator;

STK has two methods for generating TLEs; Trajectory Sampling method and Single Point method. I have read the differences both of them at http://help.agi.com/stk/index.htm#stk/tools-10.htm but I am ...
Elisa Fitri's user avatar
4 votes
1 answer
813 views

Saving STK Scenario from Python app

I'm working with Python and STK integration. I need to build scenarios and save them, the problem is that I cannot find any saving example on AGI's documentation. Here is a starting point: ...
Mefitico's user avatar
  • 1,967
4 votes
1 answer
183 views

Geo satellite - antenna gain contours to heat map in STK

I am using STK to show antenna gain contours on the ground from a transmitter on a sensor on a geo bird that is tracking a receiver on the ground. With good resolution I can create great images that ...
rebee's user avatar
  • 41
4 votes
0 answers
210 views

I'm trying to create a trajectory to Mars for a low thrust ion thruster engine using astrogator

I'm trying to create an optimize a trajectory to Mars for a number of low thrust high specific impulse engines. I am having trouble with the initial set up. I created a LEO exit spiral using a ...
Gwyn Davies's user avatar
3 votes
2 answers
1k views

STK Astrogator Earth Flyby

TLDR: How do you set up an EEV maneuver, specifically, how do you go from an earth orbit to a heliocentric orbit with a periapsis within Venus’s orbit in astrogator? I know the theory but astrogator ...
Joe Blow's user avatar
  • 131
3 votes
1 answer
487 views

Which method STK uses to compute Umbra or Penumbra time intervals?

someone knows in which way STK computes the eclipse times for a satellite? I use a Matlab code taken from D.Vallado's library (ALGORITHM 34) but even if I use a PVT provided by STK (1 sec time step) ...
Frank's user avatar
  • 315
3 votes
1 answer
285 views

STK Computation of DUT1

DUT1 is defined by Wikipedia as follows: The time correction DUT1 (sometimes also written DUT) is the difference between Universal Time (UT1), which is defined by Earth's rotation, and Coordinated ...
Mefitico's user avatar
  • 1,967
3 votes
0 answers
120 views

I am trying to create an inter-satellite network and run an inter-satellite routing protocols

I am trying to create a simulation of a network of cube sats connected to Earth station to provide me with internet. I want to run on these satellite a routing protocols can this be done using STK ...
tasnim's user avatar
  • 31
3 votes
0 answers
333 views

Running STK scenario with Python integration

I have created a scenario in STK 12.4 with a couple of satellites that will pass over a target location. I want to have a function that is called while the scenario is running. Does the Python API ...
Quaxton Hale's user avatar
2 votes
1 answer
542 views

Using astrogator in STK to separate 2 satellites using atmospheric drag

So I can do an initial separation using Astrogator by using different areas. What I need to do now is to define a distance and at that distance the area that the satellites are propagating changes. ...
Brooks's user avatar
  • 23
2 votes
1 answer
765 views

Model vehicle separation on STK Astrogator?

I am trying to model a multi-stage lunar mission with STK Astrogator. The vehicle separation happens after the first Trans Lunar Injection Burn. I've been trying to figure out how to arrange the ...
Lisa's user avatar
  • 135
2 votes
1 answer
2k views

True Anomaly of Circular Orbit

How would you calculate the true anomaly of a circular orbit (e=0)? I'm trying to design an orbit for a mission on STK and so I'm not sure what the eccentric anomaly (in order to calculate true ...
astroworld's user avatar
1 vote
1 answer
369 views

STK SGP4 for Geostationary Satellite

I am using SGP4 propagator in STK to propagate my GEO satellite. SGP4 need TLE as an input. In TLE, I found the inclination of my satellite is 0.048. But the inclination result of SGP4 is 0.15. The ...
Elisa Fitri's user avatar
1 vote
1 answer
789 views

Create a sensor in STK [closed]

how do I create a Sensor object which has a Rectangular 100x100 deg field of view? Note, this is the actual field of view; Rectangular Sensors are defined in STK by vertical and horizontal half-angles....
Malik Pasan's user avatar
1 vote
1 answer
96 views

central body frame (CBF) in STK

what is the difference between CBI and CBF in STK?
hamid's user avatar
  • 11
1 vote
1 answer
751 views

STK 11.2: perform a low-thrust optimal transfer

I'm using STK 11.2 to find a minimum-time finite transfer between two coplanar orbits. The first orbit is circular and has a radius 7000km, the second orbit has a <...
Leeloo's user avatar
  • 703
1 vote
1 answer
1k views

How can I edit the STK report output?

I have been dealing for a while on a report which is generated by STK. It contains basically time, azimuth, elevation and range data. Besides those data I need to also generate the theta and phi ...
Onur Gürdoğan's user avatar
1 vote
1 answer
908 views

STK - Create a scanning sensor

I need a tool to create a scanning-type sensor. On STK you can only select a spinning-type sensor. I found one guy who made this sensor on STK but I don't know how. The information below the linked ...
gio_ros's user avatar
  • 21
1 vote
0 answers
94 views

How to set a constant density model in STK'S Astrogator

I'm trying to verify a simplifying orbit maintenance strategy obtained from one of my numerical tools using Astrogator as a propagator. My tool uses a constant density value obtained by averaging the ...
Frank's user avatar
  • 315
1 vote
0 answers
57 views

multiple launch by Astrogator [closed]

I want to launch 24 satellites in group of 3 by use of STK Astrogator. How should I do it?? I changed the epoch, raan and true anomaly but I could not make it. thanks for your help
sahar a.a's user avatar
0 votes
0 answers
37 views

Exporting the data about angles from STK

I recently started learning how to use STK, I was wondering how I would export data for the angles of the solar panels into something like a spreadsheet. I can easily do this with values like ...
Ahmadh Hassan's user avatar
0 votes
0 answers
71 views

In System tool kits(STK), it spends too much time to get the access reports of Walker System

I use Matlab2022a and STK11.6 COM connection, I create a Walker system including 100 satelltes and it takes about 10 minutes to obtain access reports between 100 satellites. Is there any way to reduce ...
Ab Tiny's user avatar
0 votes
0 answers
227 views

Orbital Angular Momentum on STK

I want to allign my satellite with the orbital angular momentum vector. Thus, I've computed this vector in a Fixed Coordinate System using the cross product (r x v) between position vector and ...
Frank's user avatar
  • 315