Table 1
Observing conditions for the OVIRS data analyzed in this paper.
| Obs. | Date | Δ | Res. | α | Nspec |
|---|---|---|---|---|---|
| (km) | (m) | (°) | |||
| PS | 9 Dec. 2018 | 11.3 | 45 | 91.3–92.1 | 423 |
| PS | 12 Dec. 2018 | 10.0 | 40 | 38.3–51.9 | 8946 |
| PS | 13 Dec. 2018 | 9.9 | 40 | 38.3–51.8 | 1741 |
| PS | 16 Dec. 2018 | 11.3 | 45 | 90.4–91.3 | 237 |
| PS | 17 Dec. 2018 | 11.0 | 44 | 89.7–91.3 | 655 |
| BBD3 | 21 March 2019 | 3.6 | 14 | 30.1–31.3 | 16207 |
| EQ1 | 25 April 2019 | 4.9 | 20 | 42.6–48.0 | 7431 |
| EQ2 | 2–3 May 2019 | 4.9 | 20 | 128.5–132.6 | 641 |
| EQ3 | 9 May 2019 | 4.8 | 19 | 7.8–10.4 | 7109 |
| 11 May 2019 | 5.3 | 21 | 50.9–62.6 | 4688 | |
| EQ4 | 16 May 2019 | 4.8 | 19 | 29.7–30.4 | 6040 |
| EQ5 | 23 May 2019 | 4.8 | 19 | 90.2–92.6 | 907 |
| 26 May 2019 | 4.3 | 17 | 76.0–88.3 | 3391 | |
| EQ6 | 30-31 May 2019 | 5.1 | 20 | 128.0–132.7 | 480 |
| EQ7 | 6 June 2019 | 4.9 | 20 | 90.1–93.3 | 445 |
| BBD2 | 26 Sept. 2019 | 3.8 | 15 | 7.3–10.8 | 8209 |
| re-fly | |||||
| Recon | 5 Oct. 2019 | 1.35 | 5.4 | 29.4–50.6 | 3084 |
| Recon | 12 Oct. 2019 | 1.22 | 4.9 | 27.1–44.2 | 4711 |
| Recon | 19 Oct. 2019 | 1.29 | 5.2 | 37.0–47.0 | 4705 |
| Recon | 26 Oct. 2019 | 1.35 | 5.4 | 21.5–51.8 | 3226 |
| Recon | 21–22 Jan. 2020 | 0.87 | 3.5 | 65.8–88.2 | 5585 |
| Recon | 11 Feb. 2020 | 0.96 | 3.8 | 12.7–59.1 | 9376 |
Notes. The heading “Obs.” indicates the mission phase, in which PS is Preliminary Survey, BBD is Baseball Diamond, EQ is Equatorial Station, and Recon is Reconnaissance. We excluded from our analysis the data acquired during the BBD1 & 2 observations on 2019 March 7th and 14th, respectively, because they are affected by saturation or calibration issues. The BBD2 was re-flown in September, and those data are included. The quantity Δ is the spacecraft-Bennu distance, Res. the spatial resolution, α the phase angle. The heading Nspec indicates the number of spectra used in this study from each dataset satisfying the criteria on fill factor, incidence and emission angles, and radiance detailed in Sect. 2.
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