2.1 Sources (license-clean options)
- Public ephemeris (verification only). Geocentric daily longitudes from a reputable public service, used strictly for back-tests and benchmarking.
- Internal reference tables (bootstrapping). Compact traditional-method tables you export (e.g., D1/D15 or D1/D8/D15/D22) to seed the kernel when you prefer not to depend on external ephemerides later.
- On-device runtime. After calibration, evaluation uses only the JSON-style manifest; no external calls or data.
Hybrid policy. Measure with a public ephemeris if needed, derive a tiny kernel from your internal tables, then run ephemeris-free at inference.
2.2 Time & frame (fixed choices)
- Timescale. UTC with a single daily timestamp (e.g., 00:00 UTC). If you choose a local timescale such as 05:30 IST, use it consistently for all training and evaluation.
- Reference. Geocentric, apparent, sidereal (Lahiri / Chitrapaksha).
- Angles. Degrees in
[0,360). Wrap withwrap360(x). A simple utility iswrap360(x) = x - 360*floor(x/360). - Rasi.
rasi(x) = floor( wrap360(x) / 30 )with range0..11. - Cusp dating convention. Record ingresses on the previous day after year-boundary normalization.
Navigation
Back: SSM-JTK – What we claim / do not claim (1.7)
Next: SSM-JTK – Data & Calibration — Pre-processing (2.3)
Directory of Pages
SSM-JTK – Series index & links
Disclaimer
The contents in the Shunyaya Symbolic Mathematics Jyotish Transit Kernel (SSM-JTK) materials are research/observation material. They are not astrological advice, not a scientific ephemeris, and not operational guidance. Do not use for safety-critical, medical, legal, or financial decisions. Use at your own discretion; no warranties are provided; results depend on correct implementation and inputs.
Explore Further
https://github.com/OMPSHUNYAYA/Symbolic-Mathematics-Jyotish-Transit-Kernel
SHUNYAYA 