This study presents an evaluation of the TanSat-2 satellite's capabilities for dual-band solar-induced chlorophyll fluorescence (SIF) retrieval through spectral simulations and end-to-end orbit simulations. The research demonstrates a well-structured approach, rigorous methodological design, and scientifically valuable findings. It is recommended for acceptance after addressing the following revisions:

1. Line numbers should be consistent in the whole manuscript not start with 1 for each page.
2. For section 4.2: The manuscript lacks detailed descriptions of data preprocessing steps, particularly in the end-to-end orbit simulations. For example, cloud contamination were not explicitly modeled, and the impact of cloud screening on SIF retrieval accuracy remains unclear. It is recommended to supplement details on cloud screening strategies and their implications for retrieval performance.
3. For page 16: The manuscript mentions that differences between retrieved SIF and GOSIF inputs were generally within 0.15 mW m⁻² sr⁻¹ nm⁻¹, yet it does not explore potential biases or regional variations in retrieval errors. A more detailed discussion on possible sources of discrepancies (e.g., land cover types, atmospheric effects) would strengthen the validity of the results.
4. For appendix Figure A2 & A4: The mentioned figures showing 4-day and 8-day composites,They are mentioned in the results but are not adequately described in the main text. It is recommended to integrate a brief discussion of their significance and ensure that all supplementary figures are clearly referenced.
5. While the manuscript is well-structured, some sections contain lengthy technical descriptions that could benefit from clearer segmentation. Additionally, minor grammatical inconsistencies exist, particularly in the descriptions of retrieval equations. Comprehensive language polishing is advised to improve readability and ensure consistency in technical terminology.