Dataset: Tracking the south polar seasonal cap retreat of Mars using computer vision
Description
These CSV files contain the ellipse fit parameters used for the analysis in Acharya, P. J., Smith, I. B., & Calvin, W. M. (2024). “Tracking the South Polar Seasonal Cap Retreat of Mars Using Computer Vision.” Icarus. DOI: 10.1016/j.icarus.2024.116104.
The SPSC ellipse is derived using a mosaic of MARCI images developed by Calvin, W. M., Cantor, B. A., & James, P. B. (2017). Interannual and seasonal changes in the south seasonal polar cap of Mars: Observations from MY 28-31 using MARCI. Icarus, 292, 144-153.. Each mosaic is 1000x1000 pixels with a spatial resolution of 0.072246423 Latitude ° per pixel.
The file names follow the convention ##.csv, where ## represents the Mars Year (MY). The following table shows what each variable presents.
| Variable Name | Description [Units] |
| Ls |
Solar Lonigude [°] |
| Major Axis |
Semi-major axis value [Latitude °] |
| Minor Axis |
Semi-minor axis value [Latitude °] |
| Average Axis |
Average axis (See publication for more information) [Laitutde °] |
| Major_Angle |
Rotation of the fitted ellipse from 0E (°) |
| Dis_Center |
Distance between the center of the ellipse and the geographical center [Latitude °] |
| Center X |
X coordinate of the center of the ellipse [Pixels] |
| Center Y |
Y coordinate of the center of the ellipse [Pixels] |
| Area |
Area of the ellipse [Squared kilometers] |
| Circle_Radius |
The radius of the circle of best fit [Latitude °] |
| Contour_Area |
Area of the SPSC [Squared kilometers] |