1. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. ASVPD versus ASTD for measurements taken during the VAMPIRA trial in Surendorf, Germany, in 2004. The two large dashed lines show the maximum ASVPD as a function of ASTD for the minimum and maximum sea temperatures observed during the trial. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033

2. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. ASVPD versus ASTD for measurements taken during the RED trial in Hawaii in 2001. The two large dashed lines show the maximum ASVPD as a function of ASTD for the average sea temperatures observed during the trial. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033

3. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. ASVPD versus ASTD for measurements taken during a trial in Lorient France in 1989. The large dashed line shows the maximum ASVPD as a function of ASTD for the average sea temperature observed during the trial. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033

4. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. ASVPD versus ASTD for the cases of optical and radar propagation for a measurement height of 10m. The intersection of the solid black curve and the vertical dashed curve defines the four operational regions. Lighter lines are also present to indicate the 1 standard deviation variation of these mean curves. Finally, the large dashed line shows the maximum ASVPD as a function of ASTD. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033

5. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. Saturated vapor pressure from CRC data, the DRDC model, and from Bolton are plotted between −15 and 50°C along with the percent differences between the models and the CRC data. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033

6. Date of download: 7/9/2016 Copyright © 2016 SPIE. All rights reserved. Vapor pressure gradient versus air temperature gradient for the cases of optical (light black) and radar (dark black) propagation. The intersection of the two lines is used to define four propagation regions. The dashed line shows the maximum vapor pressure gradient. Figure Legend: From: Method to estimate infrared and radio-frequency synergy Opt. Eng. 2007;46(12):126001-126001-9. doi:10.1117/1.2816033