SimSat v0.1.3 - atmosphere and cloud fidelity controls

SimSat v0.1.3 improves daytime visible-image fidelity and makes the atmosphere/cloud model easier to tune across every supported interface.

Highlights:

• Terrain-aware atmospheric paths and a more consistent aerial veil for surfaces and cloud fronts.
• Daytime aerial-veil correction for clearer low-AOD scenes, plus relative-humidity aerosol coupling.
• A thin-limit cloud multiscatter correction and a visible cloud optical-depth scale for controlled sensitivity testing.
• Matching controls in SimSat Studio, the command-line tools, and Python for AOD, RH coupling, daytime correction, terrain-height atmosphere, cloud rendering, cloud multiscatter, Beer-powder shaping, granulation, and visible cloud optical-depth scale.
• Cloud-disabled renders now remain consistent through preparation, rendering, and Studio status reporting.

At the neutral cloud scale of 1.0, source-model cloud optical depth is preserved. Thick HRRR cloud decks can therefore remain genuinely optically thick; lowering the scale is an explicit visualization/sensitivity adjustment. Raw derived COD and infrared products are unchanged by the visible-only scale.

Terrain-height atmosphere currently uses the CPU rendering path because the GPU preview does not yet carry the required terrain-height texture.

The Windows executable is unsigned because the project signing certificate has expired. If Microsoft Defender SmartScreen appears, choose More info, then Run anyway, and verify the published SHA-256 checksum before launching.

SHA-256 checksums:

• simsat-studio-v0.1.3-windows-x86_64.exe: 5BF4AFBF59B1954D1F63A14C5A32A0AAB23B85EE06F52AEAB5815883FDA49BBE
• simsat-0.1.3-cp38-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl: 69AD811FE625C13685BD136B31F82F5185C87CFAB035EE38D65548F3AED2C4F0
• simsat-cli-v0.1.3-linux-x86_64.tar.gz: 604BF625311F5377B67CD533FEF3DE19C3A9F4B5935C5D0B7407ABD817CDC0C8
• THIRD-PARTY-NOTICES.txt: 301F4041951145FCD822A9CECC1A29730ABC7710C081E39F0FD07D6CAF6D3419