Update SA.md with character code explanations

[SoTi-AF]

Added explanations for various character codes used in the data format.

Summary by CodeRabbit

• Documentation
  • Expanded documentation with explicit mappings for status letter codes (V, 2, S, H, E) and their corresponding system identifiers, providing clearer reference material for understanding valid trailing characters and their definitions.

[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation update to research/SA.md that adds explicit code mappings for status letters appearing after the time field in the ACARS protocol. Introduces definitions for five status codes (V, 2, S, H, E) representing various transmission modes and systems.

Changes

Cohort / File(s)	Summary
Documentation research/SA.md	Added explicit code mappings for status letter codes (V = VDL-M0/A, 2 = VDL-M2, S = SATCOM, H = HFDL, E = unknown) in two locations: Analysis section and Examples/Notes area.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• makrsmark

Poem

🐰 Hop along through codes so bright,
V, 2, S, H—definitions take flight!
Status letters decoded with care,
What once was mystery floats in the air!
Documentation now complete and clear! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Update SA.md with character code explanations' directly and accurately reflects the main change: adding explicit code mappings and explanations for status letters in the SA.md documentation file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@research/SA.md`:
- Around line 68-72: The mappings for H and E are unresolved and conflict with
the “all current examples” set; update the document by marking H and E as
tentative (e.g., add “(tentative)” after H = HFDL and E = ? or move them into a
new “Unconfirmed mappings” section) or, if you have observed examples, add those
explicit examples showing H and/or E after the time field and remove the
tentative flag; ensure you reference the mapping symbols H and E and preserve
the existing V/2/S entries unchanged.

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ℹ️ Review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between cc076bd and f7653fc.

📒 Files selected for processing (1)

• research/SA.md

[coderabbitai]

⚠️ Potential issue | 🟡 Minor

Clarify evidence level for H and E mappings.

These mappings conflict with Line 66’s “all current examples” set and E = ? is still unresolved. Please label H/E as tentative (or move them to a separate “unconfirmed” list), or update Line 66 with observed examples that include them after the time field.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@research/SA.md` around lines 68 - 72, The mappings for H and E are unresolved
and conflict with the “all current examples” set; update the document by marking
H and E as tentative (e.g., add “(tentative)” after H = HFDL and E = ? or move
them into a new “Unconfirmed mappings” section) or, if you have observed
examples, add those explicit examples showing H and/or E after the time field
and remove the tentative flag; ensure you reference the mapping symbols H and E
and preserve the existing V/2/S entries unchanged.