Also misspelling: author of photos. https://greatawakening.win/p/12hRZjLZAu/space-force-17--decoded--15-of-1/ There is no: "Richard Gonzales", there is: "RIchard Gonzales". Big "i"...

So we have at least "SI"/"SIS" or ?S?I?/?S?I?S where ? is some other chars.

full output of exiftool ,maybe you notice more unusual chars in output.

ExifTool Version Number : 11.16 File Name : 1.jpg Directory : . File Size : 3.7 MB File Modification Date/Time : 2021:02:20 09:32:48+01:00 File Access Date/Time : 2021:02:20 19:16:18+01:00 File Inode Change Date/Time : 2021:02:20 19:03:50+01:00 File Permissions : rw-r--r-- File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg JFIF Version : 1.01 X Resolution : 300 Displayed Units X : inches Y Resolution : 300 Displayed Units Y : inches Current IPTC Digest : f7ca898706b35cd3ba75201107430eea Coded Character Set : UTF8 Application Record Version : 4 Keywords : USSF COMMISIONING CEREMONY Time Created : 19:26:54 Digital Creation Date : 2021:02:11 Digital Creation Time : 19:26:54 Caption-Abstract : US Airforce Photo By RIchard Gonzales IPTC Digest : f7ca898706b35cd3ba75201107430eea Exif Byte Order : Little-endian (Intel, II) Image Description : US Airforce Photo By RIchard Gonzales Make : Canon Camera Model Name : Canon EOS-1D X Mark II Resolution Unit : inches Software : Adobe Photoshop Lightroom Classic 7.1 (Macintosh) Modify Date : 2021:02:11 16:15:50 Exposure Time : 1/8000 F Number : 5.6 Exposure Program : Manual ISO : 800 Sensitivity Type : Recommended Exposure Index Recommended Exposure Index : 800 Exif Version : 0230 Date/Time Original : 2021:02:11 19:26:54 Create Date : 2021:02:11 19:26:54 Shutter Speed Value : 1/8000 Aperture Value : 5.6 Exposure Compensation : 0 Max Aperture Value : 4.0 Metering Mode : Multi-segment Flash : Off, Did not fire Focal Length : 50.0 mm Sub Sec Time Original : 83 Sub Sec Time Digitized : 83 Color Space : sRGB Focal Plane X Resolution : 1520 Focal Plane Y Resolution : 1520 Focal Plane Resolution Unit : cm Custom Rendered : Normal Exposure Mode : Manual White Balance : Auto Scene Capture Type : Standard Serial Number : 072012000256 Lens Info : 24-105mm f/? Lens Model : EF24-105mm f/4L IS USM Lens Serial Number : 000053ca78 Profile CMM Type : Linotronic Profile Version : 2.1.0 Profile Class : Display Device Profile Color Space Data : RGB Profile Connection Space : XYZ Profile Date Time : 1998:02:09 06:49:00 Profile File Signature : acsp Primary Platform : Microsoft Corporation CMM Flags : Not Embedded, Independent Device Manufacturer : Hewlett-Packard Device Model : sRGB Device Attributes : Reflective, Glossy, Positive, Color Rendering Intent : Perceptual Connection Space Illuminant : 0.9642 1 0.82491 Profile Creator : Hewlett-Packard Profile ID : 0 Profile Copyright : Copyright (c) 1998 Hewlett-Packard Company Profile Description : sRGB IEC61966-2.1 Media White Point : 0.95045 1 1.08905 Media Black Point : 0 0 0 Red Matrix Column : 0.43607 0.22249 0.01392 Green Matrix Column : 0.38515 0.71687 0.09708 Blue Matrix Column : 0.14307 0.06061 0.7141 Device Mfg Desc : IEC http://www.iec.ch Device Model Desc : IEC 61966-2.1 Default RGB colour space - sRGB Viewing Cond Desc : Reference Viewing Condition in IEC61966-2.1 Viewing Cond Illuminant : 19.6445 20.3718 16.8089 Viewing Cond Surround : 3.92889 4.07439 3.36179 Viewing Cond Illuminant Type : D50 Luminance : 76.03647 80 87.12462 Measurement Observer : CIE 1931 Measurement Backing : 0 0 0 Measurement Geometry : Unknown Measurement Flare : 0.999% Measurement Illuminant : D65 Technology : Cathode Ray Tube Display Red Tone Reproduction Curve : (Binary data 2060 bytes, use -b option to extract) Green Tone Reproduction Curve : (Binary data 2060 bytes, use -b option to extract) Blue Tone Reproduction Curve : (Binary data 2060 bytes, use -b option to extract) XMP Toolkit : Adobe XMP Core 5.6-c128 79.159124, 2016/03/18-14:01:55 Rating : 5 Creator Tool : Adobe Photoshop Lightroom Classic 7.1 (Macintosh) Metadata Date : 2021:02:11 16:15:50-08:00 Lens : EF24-105mm f/4L IS USM Image Number : 0 Approximate Focus Distance : 4294967295 Flash Compensation : 0 Firmware : 1.0.2 Date Created : 2021:02:11 19:26:54.83 Document ID : xmp.did:85a7a681-fb93-497d-b88d-b4063b84ef0c Original Document ID : AF8233F0EAA9ACE0675B7171E6EFBC92 Instance ID : xmp.iid:85a7a681-fb93-497d-b88d-b4063b84ef0c Format : image/jpeg History Action : derived, saved, converted, derived, saved History Parameters : converted from image/x-canon-cr2 to image/jpeg, saved to new location, from image/jpeg to image/x-canon-cr2, converted from image/x-canon-cr2 to image/jpeg, saved to new location History Instance ID : xmp.iid:f8b9cb9b-3279-42f5-a71a-238749bd6522, xmp.iid:85a7a681-fb93-497d-b88d-b4063b84ef0c History When : 2021:02:11 16:15:50-08:00, 2021:02:11 16:15:50-08:00 History Software Agent : Adobe Photoshop Lightroom Classic 7.1 (Macintosh), Adobe Photoshop Lightroom Classic 7.1 (Macintosh) History Changed : /, / Derived From Instance ID : xmp.iid:f8b9cb9b-3279-42f5-a71a-238749bd6522 Derived From Document ID : xmp.did:f8b9cb9b-3279-42f5-a71a-238749bd6522 Derived From Original Document ID: AF8233F0EAA9ACE0675B7171E6EFBC92 Description : US Airforce Photo By RIchard Gonzales Subject : USSF COMMISIONING CEREMONY Image Width : 5185 Image Height : 3457 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:4:4 (1 1) Aperture : 5.6 Date/Time Created : 2021:02:11 19:26:54 Digital Creation Date/Time : 2021:02:11 19:26:54 Image Size : 5185x3457 Megapixels : 17.9 Scale Factor To 35 mm Equivalent: 1.1 Shutter Speed : 1/8000 Create Date : 2021:02:11 19:26:54.83 Date/Time Original : 2021:02:11 19:26:54.83 Circle Of Confusion : 0.028 mm Depth Of Field : inf (15.68 m - inf) Field Of View : 37.7 deg Focal Length : 50.0 mm (35 mm equivalent: 52.8 mm) Hyperfocal Distance : 15.68 m Lens ID : Canon EF 24-105mm f/4L IS USM Light Value : 14.9

Also - I have a question why we not follow the way mentioned earlier in: https://greatawakening.win/p/12hRZjLZAu/space-force-17--decoded--15-of-1/

Were my look and u/RageBringer look at that not useful at all ?

/https://greatawakening.win/p/12hRZjLZAu/space-force-17--decoded--15-of-1/