Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction

Earth, Planets and Space

Table 3 Parameters calculated from detected limb points in each wavelength

Case	Instrument	Wavelength (μm)	Day/night	\(\bar{a}\)	\(\hat{a}\)	\(\sigma\)
L	ir1	0.97	Night	− 4.82E−11	8.82E−11	8.22E−01
	ir1	0.9	Day	− 1.23E−11	1.98E−11	4.29E−02
	ir1	0.9	Night	− 4.35E−11	8.05E−11	9.51E−01
	ir1	1.01	Night	4.46E−12	4.03E−11	3.04E−01
	ir2	1.74	Night	− 9.22E−12	2.94E−11	1.62E−01
	ir2	2.02	Day	− 3.12E−12	2.29E−11	8.56E−02
	ir2	2.26	Night	− 8.83E−11	1.15E−10	3.51E−01
	ir2	2.32	Night	− 9.06E−11	9.38E−11	3.84E−01
	lir		Both	− 1.68E−13	6.11E−14	8.32E−02
	uvi	0.283	Day	1.41E−12	4.72E−12	2.94E−02
	uvi	0.365	Day	1.44E−12	5.06E−12	3.63E−02
S	ir1	0.9	Day	4.27E−12	3.93E−12	4.13E−02
	ir2	1.74	Night	− 2.03E−11	6.07E−11	1.73E−01
	ir2	2.02	Day	4.06E−13	8.25E−12	4.62E−02
	ir2	2.26	Night	− 5.20E−11	1.17E−10	2.50E−01
	ir2	2.32	Night	− 2.10E−11	1.07E−10	3.27E−01
	lir		Both	− 1.32E−13	3.48E−14	5.45E−02
	uvi	0.283	Day	1.32E−12	6.20E−12	2.97E−02
	uvi	0.365	Day	− 5.36E−14	7.62E−12	4.53E−02

The average \(\bar{a}\) and standard deviation \(\hat{a}\) in coefficient a, and the standard deviation σ in residuals from Eq. (4). Coefficient a and residuals from Eq. (4) are derived by fitting Eq. (4) to radial residuals of limb points detected in images listed in Additional file 1 from the ellipses. Cases L and S mean the cases where the distance between the spacecraft and the Venus center is shorter than 1.6 × 10⁴ km and longer than 3.5 × 10⁴ km, respectively