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.gov website belongs to an official
government organization in the United States.
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Decoding accuracy achieved with single parameter pairs (standard deviation in parenthesis).
| Visual angle | α1 | α2 | α3 | α4 | α5 |
| φ1 | 77.7 (17.9) % | 79.3 (16.9) % | – | – | – |
| φ2 | – | 83.2 (13.0) % | 82.5 (15.4) % | – | – |
| φ3 | – | – | 79.6 (15.5) % | 79.7 (14.6) % | — |
| φ4 | – | – | – | 83.4 (17.6) % | 80.4 (17.4) % |
