The issue regarding the model orientation

[bigleaffrog]

Dear Professor Auer,

I hope this message finds you well.
To compare the measured SAR images with simulation results, the model orientation needs to be determined based on the actual satellite orbit during SAR simulation. However, I'm unclear about this step and don't fully understand the coordinate transformation between Accutrans and POV-Ray.

The specific issue is illustrated in the following figure:

the green dot represents the location of the model, the black dots indicate the positions of the satellite during the SAR imaging process, and the red dot shows the satellite position relative to the model at the time of imaging for that particular image.

The specific model is shown in the figure below.

How should I set the position of the light source in POV-Ray to ensure that the simulation's imaging angle matches the actual SAR?

Thank you for considering my question.

Warm regards,

Hao Ye

[StefanJAuer]

There are basic recommendations for modeling: - signal source and camera are at the same position (signal emission and detection) - it is reasonable to have the sensor looking along one axis in POV-Ray, e.g. z-axis, while defining the incidence angle with coordinates along the other two axes. The coordinates are calculated based on the signal incidence angle (angle 1) and a distance value along one axis, e.g. 50 m. Pythagoras provides the distance along the other axis. - it is reasonable to move the scene model to the origin of the POV-Ray coordinate system (0,0,0) and apply the required rotation there to define the aspect angle of the sensor (angle 2). Von: leaffrog ***@***.***> Gesendet: Samstag, 31. August 2024 11:09 An: StefanJAuer/RaySAR ***@***.***> Cc: Subscribed ***@***.***> Betreff: [StefanJAuer/RaySAR] The issue regarding the model orientation (Issue #18) Dear Professor Auer, I hope this message finds you well. To compare the measured SAR images with simulation results, the model orientation needs to be determined based on the actual satellite orbit during SAR simulation. However, I'm unclear about this step and don't fully understand the coordinate transformation between Accutrans and POV-Ray. The specific issue is illustrated in the following figure: 1.jpg (view on web)<https://github.com/user-attachments/assets/891863df-1a7b-46c5-afb3-1f9071d992bc> the green dot represents the location of the model, the black dots indicate the positions of the satellite during the SAR imaging process, and the red dot shows the satellite position relative to the model at the time of imaging for that particular image. The specific model is shown in the figure below. How should I set the position of the light source in POV-Ray to ensure that the simulation's imaging angle matches the actual SAR? 2.jpg (view on web)<https://github.com/user-attachments/assets/b35b26ef-2608-4ff8-8cf1-445f3338a51b> c — Reply to this email directly, view it on GitHub<#18>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AD4U5T6TBGGGYPM5EXDTEKTZUGB3BAVCNFSM6AAAAABNNWNATWVHI2DSMVQWIX3LMV43ASLTON2WKOZSGQ4TQNZUGI4DQNA>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.******@***.***>>