EKHI

Materials

Curve 1

Temperature, K: 298 Wavelength Range, µm: 0.40-15.22 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Aluminum 24S-T81 (2024-T81) anodized in sulfuric acid; nominal composition: 4.5 Cu, 1.5 Mg, 0.6 Mn, Al balance; data extracted from smooth curve.

Wavelength / 𝜇m	Reflectance /
0.4	0.496
0.44	0.501
0.51	0.501
0.55	0.484
0.64	0.503
0.71	0.503
0.8	0.493
0.85	0.493
0.94	0.58
0.99	0.615
1.24	0.56
1.46	0.602
1.97	0.661
2.22	0.671
2.49	0.662
3.0	0.139
3.24	0.204
3.72	0.492
3.98	0.509
4.23	0.562
4.47	0.582
4.99	0.564
5.46	0.648
5.74	0.62
6.0	0.497
6.25	0.428
6.99	0.475
7.28	0.508
7.54	0.467
7.7	0.412
8.15	0.232
8.38	0.164
8.71	0.131
9.2	0.131
10.2	0.182
10.47	0.182
10.93	0.161
11.2	0.161
11.45	0.172
11.9	0.172
12.25	0.18
12.77	0.18
13.48	0.208
13.92	0.201
14.3	0.22
14.64	0.231
14.91	0.247
15.22	0.231

Curve 2

Temperature, K: 298 Wavelength Range, µm: 13.20-25.04 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions.

Wavelength / 𝜇m	Reflectance /
13.26	0.051
13.92	0.051
14.48	0.08
14.69	0.08
15.21	0.089
15.74	0.089
16.03	0.1
16.33	0.1
16.51	0.11
16.74	0.101
17.26	0.12
17.55	0.12
17.8	0.132
18.27	0.132
18.53	0.151
18.72	0.14
18.98	0.14
19.49	0.16
19.83	0.16
19.99	0.151
20.27	0.182
20.79	0.161
21.29	0.188
21.5	0.173
22.01	0.191
22.25	0.22
22.5	0.22
22.77	0.196
23.06	0.217
23.23	0.2
23.58	0.238
23.82	0.238
24.06	0.219
25.04	0.219

Curve 3

Temperature, K: 298 Wavelength Range, µm: 0.41-24.93 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions except substrate was chem-milled.

Wavelength / 𝜇m	Reflectance /
0.41	0.5
0.45	0.561
0.56	0.551
0.61	0.538
0.75	0.514
0.99	0.616
1.27	0.645
1.66	0.69
2.26	0.717
2.51	0.692
3.01	0.112
3.3	0.13
3.49	0.194
3.76	0.4
3.92	0.4
4.2	0.456
4.48	0.468
4.73	0.409
5.02	0.433
5.24	0.519
5.48	0.536
5.76	0.446
5.94	0.297
6.24	0.17
6.42	0.244
6.81	0.412
7.23	0.344
7.52	0.293
7.81	0.278
8.38	0.17
8.69	0.131
9.2	0.131
9.69	0.151
10.29	0.151
10.48	0.137
10.7	0.157
10.97	0.149
11.44	0.172
12.23	0.17
12.47	0.179
12.75	0.17
12.84	0.188
13.2	0.198
13.58	0.185
13.91	0.219
14.17	0.214
14.29	0.221
14.75	0.221
14.96	0.242
15.24	0.233
16.16	0.268
16.69	0.268
16.93	0.28
17.2	0.28
17.41	0.269
17.79	0.281
17.95	0.281
18.44	0.295
18.62	0.291
19.5	0.305
19.95	0.29
20.23	0.299
22.18	0.299
22.43	0.316
22.78	0.301
23.59	0.367
24.02	0.33
24.93	0.331

Curve 4

Temperature, K: 298 Wavelength Range, µm: 0.41-24.28 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to curve 1 specimen and conditions except anodized in chromic acid.

Wavelength / 𝜇m	Reflectance /
0.41	0.223
0.49	0.222
0.55	0.205
0.69	0.24
0.84	0.241
0.91	0.263
0.99	0.357
1.28	0.525
1.8	0.69
2.23	0.752
2.45	0.727
2.76	0.719
3.0	0.655
3.25	0.708
3.48	0.726
3.77	0.798
3.98	0.808
4.23	0.809
4.5	0.858
4.8	0.858
5.26	0.879
5.49	0.879
5.76	0.89
6.01	0.87
6.26	0.87
6.41	0.881
6.73	0.881
7.0	0.92
7.24	0.9
8.66	0.9
9.18	0.87
9.76	0.89
10.23	0.89
10.48	0.865
10.8	0.879
12.45	0.879
13.39	0.859
13.97	0.859
14.02	0.87
15.59	0.87
16.57	0.887
19.59	0.887
19.59	0.898
24.28	0.899

Curve 5

Temperature, K: 298 Wavelength Range, µm: 0.40-15.02 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions except anodized in black chromic acid.

Wavelength / 𝜇m	Reflectance /
0.4	0.061
0.44	0.049
0.6	0.049
0.64	0.058
0.69	0.118
0.75	0.348
0.8	0.457
0.83	0.483
0.92	0.56
0.99	0.61
1.24	0.531
1.49	0.579
1.7	0.598
2.23	0.626
2.47	0.586
2.73	0.226
2.94	0.141
3.04	0.135
3.5	0.229
3.76	0.389
4.13	0.437
4.23	0.45
4.52	0.45
4.74	0.443
5.02	0.453
5.49	0.503
5.8	0.476
5.97	0.314
6.24	0.229
6.75	0.318
7.02	0.318
7.09	0.333
7.17	0.36
7.49	0.358
7.76	0.313
7.99	0.22
8.5	0.105
8.82	0.088
9.46	0.109
10.02	0.109
10.17	0.115
10.33	0.115
10.47	0.109
10.75	0.128
11.0	0.112
11.22	0.11
13.26	0.11
13.49	0.127
13.74	0.127
14.49	0.179
14.77	0.16
15.02	0.191

Curve 6

Temperature, K: 298 Wavelength Range, µm: 13.00-24.93 Geometry θ ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions.

Wavelength / 𝜇m	Reflectance /
13.0	0.038
13.53	0.038
13.82	0.052
14.15	0.052
14.62	0.08
15.02	0.08
15.55	0.117
15.74	0.117
16.04	0.126
16.73	0.126
17.25	0.147
17.62	0.147
17.79	0.156
18.32	0.156
18.51	0.189
18.91	0.177
20.6	0.177
20.89	0.187
21.45	0.187
21.81	0.21
22.1	0.217
22.27	0.247
22.58	0.226
23.05	0.226
23.21	0.221
23.44	0.233
23.5	0.255
23.79	0.255
23.92	0.248
24.14	0.227
24.93	0.227

Curve 1

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Aluminum 24S-T81 (2024-T) anodized in chromic acid; nominal composition: 4.5 Cu, 1.5 Mg and 0.6 Mn.

Temperature / K	Reflectance /
298.0	0.28

Curve 2

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions except calculated from spectral data.

Temperature / K	Reflectance /
298.0	0.3

Curve 3

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to curve 1 specimen and conditions except anodized in black chromic acid.

Temperature / K	Reflectance /
298.0	0.31

Curve 4

Temperature / K	Reflectance /
298.0	0.29

Curve 5

Temperature / K	Reflectance /
298.0	0.56

Curve 6

Temperature / K	Reflectance /
298.0	0.53

Curve 7

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to curve 5 specimen and conditions except substrate was chem-milled.

Temperature / K	Reflectance /
298.0	0.64

Curve 8

Temperature / K	Reflectance /
298.0	0.57

Curve 1

Temperature, K: 298 Wavelength Range, µm: 0.41-25.01 Geometry θ θ' ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Alclad 24-ST 81 (Alclad 2024-T, aluminum 1050 on aluminum 2024-T) anodized in chromic acid; nominal composition of 1050 aluminum: 0.40 Fe, 0.25 Si, 0.05 Cu, 0.05 Mn, 0.05 Mg, 0.05 Zn, 0.03 Ti and 0.15 others; data extracted from smooth curve.

Wavelength / 𝜇m	Reflectance /
0.41	0.485
0.5	0.55
0.59	0.573
0.69	0.601
0.75	0.587
0.79	0.593
0.83	0.559
0.94	0.686
0.99	0.705
1.24	0.683
1.72	0.763
1.98	0.706
2.21	0.818
2.48	0.834
2.78	0.818
2.97	0.673
3.19	0.744
3.47	0.744
3.68	0.851
4.21	0.904
4.5	0.904
4.72	0.922
4.96	0.916
5.23	0.935
5.49	0.922
5.61	0.907
5.75	0.892
5.99	0.877
6.23	0.847
6.49	0.878
6.73	0.891
7.0	0.845
7.58	0.816
7.93	0.78
8.68	0.679
9.06	0.707
9.71	0.728
10.06	0.702
10.45	0.605
11.48	0.47
11.72	0.47
12.94	0.38
13.33	0.322
13.77	0.322
14.09	0.301
14.76	0.301
14.98	0.291
16.78	0.291
17.3	0.321
17.59	0.321
18.09	0.349
18.34	0.349
18.55	0.383
18.75	0.383
19.18	0.408
19.61	0.442
19.9	0.442
20.32	0.49
20.83	0.49
21.06	0.508
21.33	0.537
21.76	0.52
22.03	0.561
22.64	0.582
23.05	0.582
23.34	0.591
23.66	0.621
24.08	0.612
24.36	0.621
25.01	0.621

Curve 2

Temperature, K: 298 Wavelength Range, µm: 12.99-24.89 Geometry θ θ' ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions except anodized in black chromic acid.

Wavelength / 𝜇m	Reflectance /
12.99	0.039
13.31	0.039
13.93	0.048
14.47	0.088
14.76	0.088
15.95	0.14
16.67	0.14
17.14	0.156
17.42	0.148
18.23	0.148
18.45	0.176

Curve 3

Temperature, K: 298 Wavelength Range, µm: 0.41-14.91 Geometry θ θ' ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions.

Wavelength / 𝜇m	Reflectance /
0.41	0.056
0.65	0.056
0.71	0.074
0.81	0.517
0.96	0.689
1.0	0.717
1.26	0.685
1.74	0.74
2.0	0.704
2.27	0.704
2.49	0.633
2.73	0.164
3.02	0.071
3.5	0.104
3.96	0.251
4.27	0.281
4.48	0.245
4.76	0.224
5.02	0.291
5.26	0.265
5.52	0.328
5.78	0.246
6.0	0.144
6.51	0.015
6.78	0.022
7.01	0.099
7.28	0.168
7.57	0.149
7.8	0.078
8.75	0.04
9.27	0.069
12.45	0.069
12.72	0.079
12.89	0.07
13.15	0.079
13.68	0.078
14.26	0.098
14.51	0.12
14.69	0.118
14.91	0.138

Curve 4

Temperature, K: 298 Wavelength Range, µm: 12.92-24.95 Geometry θ θ' ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to curve 42 specimen and conditions except anodized in sulfuric acid.

Wavelength / 𝜇m	Reflectance /
12.92	0.12
13.24	0.12
13.53	0.133
13.99	0.133
14.45	0.15
15.52	0.15
15.88	0.162
17.74	0.161
18.4	0.179
19.27	0.179
19.44	0.188
19.93	0.17
20.27	0.187
20.52	0.187
20.86	0.17
21.22	0.185
21.4	0.17
21.97	0.171
22.21	0.179
24.47	0.179
24.64	0.211
24.94	0.221

Curve 5

Temperature, K: 298 Wavelength Range, µm: 0.41-14.96 Geometry θ θ' ω': ~0°~0° Composition (weight percent), Specifications, and Remarks: Similar to above specimen and conditions.

Wavelength / 𝜇m	Reflectance /
0.41	0.584
0.44	0.631
0.5	0.652
0.6	0.653
0.64	0.644
0.7	0.644
0.8	0.606
0.86	0.606
0.91	0.636
0.94	0.689
1.0	0.717
1.26	0.637
1.51	0.465
1.75	0.668
2.01	0.452
2.25	0.633
2.52	0.528
3.08	0.085
3.27	0.142
3.76	0.516
3.97	0.54
4.23	0.604
4.48	0.593
5.0	0.681
5.25	0.663
5.5	0.663
5.75	0.689
6.23	0.48
6.48	0.454
6.79	0.511
6.98	0.53
7.25	0.462
8.01	0.038
8.21	0.032
8.47	0.04
8.94	0.04
9.29	0.052
9.48	0.08
9.77	0.08
10.23	0.036
11.22	0.075
11.46	0.145
11.74	0.171
11.96	0.153
12.15	0.171
12.69	0.171
13.43	0.222
14.22	0.222
14.5	0.25
14.69	0.24
14.96	0.254

Curve 1

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Alclad 24-ST81 (Alclad 2024-T, aluminum 1050 on aluminum 2024-T), anodized in chromic acid; nominal composition of 1050 aluminum: 0.40 Fe, 0.25 Si, 0.05 Cu, 0.05 Mn, 0.05 Mg, 0.05 Zn, 0.03 Ti, and 0.15 others; calculated from spectral data.

Temperature / K	Reflectance /
298.0	0.46

Curve 2

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions.

Temperature / K	Reflectance /
298.0	0.56

Curve 3

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to curve 9 specimen and conditions except anodized in black chromic acid.

Temperature / K	Reflectance /
298.0	0.33

Curve 4

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions.

Temperature / K	Reflectance /
298.0	0.31

Curve 1

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: Calculated from spectral data.

Temperature / K	Reflectance /
298.0	0.36

Curve 2

Temperature Range, K: 298 Geometry θ θ' ω': ~0° 2π Composition (weight percent), Specifications and Remarks: No details given.

Temperature / K	Reflectance /
298.0	0.37

Solar reflectance integrating sphere