Dear Pooja,

The method of LST retrieval from Landsat 9 is same as Landsat 8. Please follow this article: https://authors.elsevier.com/c/1jcL3_oJ1Sog~k

You're facing a common hurdle in remote sensing: applying formulas calibrated for one sensor (Landsat 8) to another (Landsat 9). While the underlying physics remains the same, subtle differences in sensor characteristics, calibration, and atmospheric conditions can impact constant values used in LST calculations.

Key Considerations and Potential Solutions:

Additional Tips:

• Iterative Approach: Refine your LST calculation process through experimentation and validation.
• Consult Experts: Seek advice from remote sensing experts or researchers who have experience with Landsat 9 data.
• Explore Alternative Methods: Consider using different LST retrieval algorithms or approaches that might be more robust to sensor differences.

Specific Questions:

To provide more tailored advice, please share more details about:

• The specific Landsat 8 LST equation you're using.
• The constant values you're unsure about.
• The geographic region you're studying.
• The types of land cover present in your study area.

@Pooja Yadav You may prefer using Collection 2 Surface Temperature products available globally for the

Landsat 9 Operational Land Imager 2 (OLI-2): February 2022 to present.

https://www.usgs.gov/landsat-missions/landsat-collection-2-surface-temperature