Error dependencies in the space-based CNEOS fireball database

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Table 4

Median and (upper and lower) 1 σ standard deviations of the D_D values and orbital element, velocity, and geocentric radiant errors for the 18 calibrated fireballs from CNEOS.

	High- D_D	Low- D_D
	(Yr. < 2018 & E_i < 0.45)	(Yr. ≥ 2018 ∣ E_i ≥ 0.45)
D_D	${0.31}_{- 0.05}^{+ 0.39}$ $\$0.31_{-0.05}^{+0.39}$$	${0.03}_{- 0.01}^{+ 0.02}$ $\$0.03_{-0.01}^{+0.02}$$
σ_a(au)	${1.58}_{- 0.92}^{+ 3.29}$ $\$1.58_{-0.92}^{+3.29}$$	${0.04}_{- 0.04}^{+ 0.30}$ $\$0.04_{-0.04}^{+0.30}$$
σ_e	${0.27}_{- 0.19}^{+ 0.17}$ $\$0.27_{-0.19}^{+0.17}$$	0.02^{+0.04}
σ_i(°)	${11.74}_{- 7.26}^{+ 4.68}$ $\$11.74_{-7.26}^{+4.68}$$	${1.07}_{- 0.86}^{+ 0.26}$ $\$1.07^{+0.26}_{-0.86}$$
$σ_{ω} (^{\circ})$ $\$\sigma_{\omega}\left({}^{\circ}\right)$$	${83.07}_{- 69.90}^{+ 81.44}$ $\$83.07_{-69.90}^{+81.44}$$	${1.25}_{- 0.66}^{+ 3.55}$ $\$1.25^{+3.55}_{-0.66}$$
$σ_{Ω} (^{\circ})$ $\$\sigma_{\Omega}\left({}^{\circ}\right)$$	${0.009}_{- 0.005}^{+ 0.010}$ $\$0.009_{-0.005}^{+0.010}$$	${0.028}_{- 0.018}^{+ 0.225}$ $\$0.028_{-0.018}^{+0.225}$$
V	${6.05}_{- 2.21}^{+ 1.44}$ $\$6.05_{-2.21}^{+1.44}$$	${0.55}_{- 0.45}^{+ 0.37}$ $\$0.55_{-0.45}^{+0.37}$$
α_g	${67.24}_{- 56.20}^{+ 69.99}$ $\$67.24_{-56.20}^{+69.99}$$	${1.35}_{- 0.79}^{+ 1.12}$ $\$1.35_{-0.79}^{+1.12}$$
δ_g	${11.71}_{- 4.47}^{+ 8.78}$ $\$11.71_{-4.47}^{+8.78}$$	${0.84}_{- 0.79}^{+ 1.00}$ $\$0.84_{-0.79}^{+1.00}$$

Notes. Low-D_D and high-D_D are well separated by the cutoff value of 0.1, corresponding to thresholds of events recorded after late 2017 or with impact energies exceeding 0.45 kt.

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