Eclipse Digital Camera Imagery and Movie Notes

During Eclipse 2019, the NSF/NCAR GV (N677F) flew one left-facing digital camera for in-flight video capture. It is Point Grey Research Scorpion 20SOC color camera, 1600 x 1200 resolution, 4.4 micrometer pixels equipped with a Fujinon, model = HF50SA-1 lens. The field of view is 8.0 degrees horizontal, 6.0 degrees vertical, and has a 50mm focal length, set at F/8.

The filter used to reduce intensity before and after the totality was DayStar #ULF50-2

Images were acquired once per second and stored as JPEG-compressed files, roughly 100 kB each. No image processing was performed beyond converting the raw pixel data to 24 bit color images. Applying a sharpening filter as is ordinarily done by consumer digital cameras will considerably improve the appearance. The UTC date and time are encoded in the filename as YYMMDD-HHMMSS.jpg.

H.264 compressed, half-resolution movies (.mp4) were created. Each 1-second image was processed with the linux ImageMagick toolkit. The image was first cropped to 512x384 pixels. Sharpening was then performed [SHARPEN(0.0x1.0)]. Each image was then annotated in the lower left with the time the image was recorded and in the upper right with the pointing. Data values at the image time for a select set of data parameters were appended to the right of each image block. These 1-second annotated images were compiled into a video stream running at 15 frames/s, 1500 kbps data rate.