ISRO Mission

Aditya-L1

India's first dedicated solar observatory, stationed 1.5 million km sunward at the Sun–Earth L1 point — providing uninterrupted observation of the photosphere, chromosphere, and corona.

Launch

2 Sep 2023

Orbit

L1 Halo · 1.5M km

Operator

ISRO

Mission life

5+ years

SoLEXS

Solar Low-Energy X-ray Spectrometer

Two SDD detectors covering 2–22 keV at ~180 eV resolution, sampling soft X-ray flux every second. Characterises the thermal phase of solar flares and feeds real-time spectroscopy to ground.

Energy

2–22 keV

Cadence

1 s

Resolution

~180 eV

Integration plan

01Ingest SoLEXS soft X-ray (2–22 keV) light curves from ISSDC PRADAN at 1-second cadence.
02Ingest HEL1OS hard X-ray (8–150 keV) CdTe and CZT light curves from ISSDC PRADAN.
03Engineer 20 features per second — rolling statistics, derivatives, spectral hardness ratios.
04Run Random Forest classifier to predict P(quiet), P(pre-flare), P(flare) every 60 seconds.
05Serve predictions via FastAPI — frontend displays live nowcast and 30/60-minute forecast.