Martian crater ages and crater counting - Does the impact flux of small and large asteroids varied through time on Mars, the Earth and the Moon?

• The SM_mars_crater_dating.xlsx table contains all the information used to date the 49 martian impact craters considered in this study (< 600 Ma). 

1. CRATER ID 
2. CRATER NAME
3. DIAM KM 
4. LAT 
5. LONG 
6. DEPTH RIM KM 
7. DEPTH SURF KM 
8. DEPTH FLOOR KM 
9. NUMBER LAYER
10. MORPHO EJECTA 
11. PRESERVATION 
12. COUNT AREA KM2: counting area from ejecta banket mapping 
13. COUNT AREA ASCI* KM2: counting area after removal of surfaces contaminated by secondary craters 
14. THRESHOLD AREA KM2: minimum size of Voronoi polygon area below which all associated detected craters are considered of secondary origin
15. NB SEC: number of secondary craters dentified by ASCI 
16. PERCENT SEC
17. NB CRAT 100M: total number of craters > 100 m detected by the CDA** on the CTX global mosaic*** over the counting area
18. NB PRIM 100M: number of craters identified as primaries by ASCI
19. TURNOFF DIAM KM: minimum crater diameter used to fit the crater-size frequency distribution (CSFD) with an isochron
20. NB CRAT FIT: number of craters used to fit the CSFD with an isochron
21. AGE GA: model age based on Hartmann (2005) chronology model**** and Michael et al. (2016) fitting technique*****
22. AGE MAX GA
23. AGE MIN GA
24. N(1): equivalent number of accumulated craters >1km per km2
25. N(1) MAX
26. N(1) MIN

*ASCI: Automatic Secondary Crater Identification: A. Lagain, K. Servis, G. K. Benedix, C. Norman, S. Anderson, P. A. Bland, Model Age Derivation of Large Martian Impact Craters, Using Automatic Crater Counting Methods, Earth and Space Science 8 (2) (2021). doi:10.1029/2020EA001598.

**CDA: Crater Detection Algorithm: G. K. Benedix, A. Lagain, K. Chai, S. Meka, S. Anderson, C. Norman, P. A. Bland, J. Paxman, M. C. Towner, T. Tan, Deriving Surface Ages on Mars Using Automated Crater Counting, Earth and Space Science 7 (3) (2020). doi:10.1029/2019EA001005.

*** CTX global mosaic: Context Camera global mosaic: J. L. Dickson, L. A. Kerber, C. I. Fassett, B. L. Ehlmann, A Global, Blended CTX Mosaic of Mars with Vectorized Seam Mapping: A New Mosaicking Pipeline Using Principles of Non-Destructive Image Editing, in: Lunar and Planetary Science Conference (2018), p. 2480.

**** W. K. Hartmann, Martian cratering 8: Isochron refinement and the chronology of Mars, Icarus 174 (2) (2005) 294–320. doi:10.1016/j.icarus.2004.11.023.

***** G. G. Michael, T. Kneissl, A. Neesemann, Planetary surface dating from crater size-frequency distribution measurements: Poisson timing analysis, Icarus 277 (2016) 279–285. doi:10.1016/j.icarus.2016.05.019.

• The crater_counting.csv table contains the location and size of impact craters used to derive the ages of the 49 craters younger than 600 Ma old presented in this study.