Interference from differential reflectance of moist topographic targets in CO<sub>2</sub> DIAL ozone measurement

Kazuhiro Asai; Takashi Igarashi

doi:10.1364/AO.23.000734

Applied Optics
Vol. 23,
Issue 5,
pp. 734-739
(1984)
•https://doi.org/10.1364/AO.23.000734

Interference from differential reflectance of moist topographic targets in CO₂ DIAL ozone measurement

Kazuhiro Asai and Takashi Igarashi

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Kazuhiro Asai and Takashi Igarashi, "Interference from differential reflectance of moist topographic targets in CO₂ DIAL ozone measurement," Appl. Opt. 23, 734-739 (1984)

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Abstract

Measurements of reflectance spectra were made for liquids and moist natural and artificial materials by 9-μm CO₂ laser lines in the P and R branches. Interference from the differential reflectance of moist material as remote topographic targets were discussed using the experimental data for the measurement of ozone with a long-path CO₂ DIAL.

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CO₂ Laser 9.4 μm Band Line		Kanto Loam			Sand			Concrete Block		Brick		Kaoline		Wood Plate
CO₂ Laser 9.4 μm Band Line
Transition Wavelength (μm)		Water Content
		0%	20%	40%	0%	10%	20%	0%	30%	0%	28%	0%	38%	0%
P(36)	9.69483	0.97	0.69	0.57	0.82	0.63	0.36	1.08	0.59	0.90	0.42	0.71	1.36	1.39
P(34)	9.67597	0.96	0.71	0.55	0.85	0.65	0.38	1.08	0.58	0.90	0.42	0.69	1.54	1.38
P(32)	9.65741	1.02	0.70	0.56	0.86	0.63	0.38	1.10	0.58	0.90	0.43	0.74	1.58	1.32
P(30)	9.63916	0.98	0.70	0.55	0.88	0.63	0.37	1.09	0.57	0.91	0.43	0.77	1.61	1.25
P(28)	9.62121	0.97	0.71	0.54	0.87	0.64	0.39	1.07	0.55	0.89	0.42	0.83	1.63	1.14
P(26)	9.60357	1.02	0.74	0.59	0.88	0.63	0.38	1.04	0.53	0.89	0.39	0.87	1.65	1.10
P(24)	9.58622	1.00	0.74	0.58	0.89	0.65	0.39	1.03	0.55	0.91	0.43	0.88	1.66	1.13
P(22)	9.56917	1.04	0.74	0.55	0.92	0.66	0.39	1.04	0.56	0.93	0.43	0.84	1.66	1.15
P(20)	9.55242	1.03	0.74	0.60	o.92	0.67	0.41	1.04	0.55	0.92	0.43	0.92	1.66	1.09
P(18)	9.53597	1.05	0.76	0.58	0.96	0.69	0.42	1.05	0.56	0.95	0.45	0.96	1.63	1.15
P(16)	9.51981	1.03	0.74	0.59	0.96	0.69	0.43	1.02	0.59	0.95	0.44	0.96	1.58	1.05
P(14)	9.50393	1.04	0.73	0.57	0.99	0.71	0.43	1.04	0.59	1.00	0.46	0.96	1.51	1.13
P(12)	9.48835	1.02	0.74	0.57	1.00	0.71	0.43	1.03	0.62	0.98	0.44	1.02	1.47	1.04
P(10)	9.47306	1.00	0.73	0.56	1.00	0.73	0.44	1.00	0.63	1.00	0.44	1.00	1.36	1.00
R(10)	9.32937	1.22	0.76	0.55	1.33	0.87	0.50	0.92	0.47	1.06	0.52	0.96	0.63	0.66
R(12)	9.31724	1.28	0.79	0.56	1.32	0.91	0.52	0.94	0.48	1.09	0.54	0.95	0.57	0.69
R(14)	9.30538	1.31	0.82	0.57	1.36	0.91	0.51	0.91	0.47	1.08	0.53	0.94	0.52	0.64
R(16)	9.29378	1.30	0.79	0.56	1.40	0.90	0.50	0.95	0.47	1.10	0.54	0.85	0.48	0.66
R(18)	9.28244	1.29	0.80	0.57	1.38	0.93	0.51	0.88	0.45	1.08	0.54	0.85	0.46	0.61
R(20)	9.27136	1.32	0.80	0.57	1.40	0.90	0.52	0.89	0.45	1.09	0.54	0.82	0.41	0.58
R(22)	9.26052	1.30	0.82	0.55	1.35	0.85	0.50	0.87	0.44	1.08	0.52	0.74	0.37	0.55
R(24)	9.24994	1.29	0.77	0.55	1.36	0.82	0.49	0.89	0.44	1.09	0.54	0.72	0.33	0.56
R(26)	9.23961	1.28	0.76	0.55	1.34	0.82	0.47	0.90	0.44	1.11	0.54	0.68	0.30	0.56
R(28)	9.22953	1.25	0.77	0.55	1.34	0.82	0.48	0.88	0.45	1.12	0.56	0.65	0.29	0.55
R(30)	9.21969	1.25	0.75	0.55	1.32	0.81	0.48	0.84	0.44	1.11	0.57	0.63	0.27	0.55

$\frac{ON LINE}{OFF LINE}$	Differential15 Absorption Cross Section (cm²)	Measurement Error (ppb · km)

		Loam		Sand		Concrete Brock		Salt Water

		dry	wet	dry	wet	dry	wet	5%
$\frac{P (12)}{P (24)}$	4.69 × 10⁻¹⁹	8.6	−8.8	49.3	41.5	0.0	53.0	17.1
$\frac{P (14)}{P (22)}$	4.45 × 10⁻¹⁹	0.0	18.0	35.3	43.7	13.6	22.4	4.6
$\frac{P (14)}{P (24)}$	4.90 × 10⁻¹⁹	16.3	−8.4	43.5	39.7	16.3	28.2	4.1
$\frac{P (26)}{P (24)}$	2.08 × 10⁻¹⁹	19.4	19.4	−9.9	−9.9	9.8	−40.0	−19.8

CO₂ Laser 9.4 μm Band Line		Kanto Loam			Sand			Concrete Block		Brick		Kaoline		Wood Plate
CO₂ Laser 9.4 μm Band Line
Transition Wavelength (μm)		Water Content
		0%	20%	40%	0%	10%	20%	0%	30%	0%	28%	0%	38%	0%
P(36)	9.69483	0.97	0.69	0.57	0.82	0.63	0.36	1.08	0.59	0.90	0.42	0.71	1.36	1.39
P(34)	9.67597	0.96	0.71	0.55	0.85	0.65	0.38	1.08	0.58	0.90	0.42	0.69	1.54	1.38
P(32)	9.65741	1.02	0.70	0.56	0.86	0.63	0.38	1.10	0.58	0.90	0.43	0.74	1.58	1.32
P(30)	9.63916	0.98	0.70	0.55	0.88	0.63	0.37	1.09	0.57	0.91	0.43	0.77	1.61	1.25
P(28)	9.62121	0.97	0.71	0.54	0.87	0.64	0.39	1.07	0.55	0.89	0.42	0.83	1.63	1.14
P(26)	9.60357	1.02	0.74	0.59	0.88	0.63	0.38	1.04	0.53	0.89	0.39	0.87	1.65	1.10
P(24)	9.58622	1.00	0.74	0.58	0.89	0.65	0.39	1.03	0.55	0.91	0.43	0.88	1.66	1.13
P(22)	9.56917	1.04	0.74	0.55	0.92	0.66	0.39	1.04	0.56	0.93	0.43	0.84	1.66	1.15
P(20)	9.55242	1.03	0.74	0.60	o.92	0.67	0.41	1.04	0.55	0.92	0.43	0.92	1.66	1.09
P(18)	9.53597	1.05	0.76	0.58	0.96	0.69	0.42	1.05	0.56	0.95	0.45	0.96	1.63	1.15
P(16)	9.51981	1.03	0.74	0.59	0.96	0.69	0.43	1.02	0.59	0.95	0.44	0.96	1.58	1.05
P(14)	9.50393	1.04	0.73	0.57	0.99	0.71	0.43	1.04	0.59	1.00	0.46	0.96	1.51	1.13
P(12)	9.48835	1.02	0.74	0.57	1.00	0.71	0.43	1.03	0.62	0.98	0.44	1.02	1.47	1.04
P(10)	9.47306	1.00	0.73	0.56	1.00	0.73	0.44	1.00	0.63	1.00	0.44	1.00	1.36	1.00
R(10)	9.32937	1.22	0.76	0.55	1.33	0.87	0.50	0.92	0.47	1.06	0.52	0.96	0.63	0.66
R(12)	9.31724	1.28	0.79	0.56	1.32	0.91	0.52	0.94	0.48	1.09	0.54	0.95	0.57	0.69
R(14)	9.30538	1.31	0.82	0.57	1.36	0.91	0.51	0.91	0.47	1.08	0.53	0.94	0.52	0.64
R(16)	9.29378	1.30	0.79	0.56	1.40	0.90	0.50	0.95	0.47	1.10	0.54	0.85	0.48	0.66
R(18)	9.28244	1.29	0.80	0.57	1.38	0.93	0.51	0.88	0.45	1.08	0.54	0.85	0.46	0.61
R(20)	9.27136	1.32	0.80	0.57	1.40	0.90	0.52	0.89	0.45	1.09	0.54	0.82	0.41	0.58
R(22)	9.26052	1.30	0.82	0.55	1.35	0.85	0.50	0.87	0.44	1.08	0.52	0.74	0.37	0.55
R(24)	9.24994	1.29	0.77	0.55	1.36	0.82	0.49	0.89	0.44	1.09	0.54	0.72	0.33	0.56
R(26)	9.23961	1.28	0.76	0.55	1.34	0.82	0.47	0.90	0.44	1.11	0.54	0.68	0.30	0.56
R(28)	9.22953	1.25	0.77	0.55	1.34	0.82	0.48	0.88	0.45	1.12	0.56	0.65	0.29	0.55
R(30)	9.21969	1.25	0.75	0.55	1.32	0.81	0.48	0.84	0.44	1.11	0.57	0.63	0.27	0.55

$\frac{ON LINE}{OFF LINE}$	Differential15 Absorption Cross Section (cm²)	Measurement Error (ppb · km)

		Loam		Sand		Concrete Brock		Salt Water

		dry	wet	dry	wet	dry	wet	5%
$\frac{P (12)}{P (24)}$	4.69 × 10⁻¹⁹	8.6	−8.8	49.3	41.5	0.0	53.0	17.1
$\frac{P (14)}{P (22)}$	4.45 × 10⁻¹⁹	0.0	18.0	35.3	43.7	13.6	22.4	4.6
$\frac{P (14)}{P (24)}$	4.90 × 10⁻¹⁹	16.3	−8.4	43.5	39.7	16.3	28.2	4.1
$\frac{P (26)}{P (24)}$	2.08 × 10⁻¹⁹	19.4	19.4	−9.9	−9.9	9.8	−40.0	−19.8

Abstract

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Applied Optics