This page uses JavaScript to browse and download data interactively. The full archive (1998–present, 1-minute cadence) is also available without it:

Python client: pip install csem-midl, then import midl; midl.load("2005-01-01 00:00", "2005-01-02 00:00", 14) (target: 14 or 32 Re, or "L1"; method="ballistic" or "mhd")
Direct monthly CSVs (all in GSM coordinates): data/{YYYY}/{MM}/{YYYYMM}_L1.csv, …_14Re.csv, …_32Re.csv, mhd/{YYYYMM}_mhd_{RRR}Re.csv
Rotation angles for GSM→GSE/SM (per-minute gsm_gse_angle_deg, dipole_tilt_deg): data/{YYYY}/{MM}/{YYYYMM}_angles.csv
Column definitions and units: format.html

Download

Configure a request below, or use the Python client to fetch data from scripts.

Final

loading… · all assimilated L1 sources present in every variable

Provisional

– · thinner spacecraft data; will be revised

Limits

1-minute resolution, up to 1 year per request

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Date & time range (UTC)

Start date Start time End date End time

Last updated: loading...

Output format

TEXT · SWMF compatible CSV

Propagation method

Ballistic · simple time shift, Δt = Δx / U_x, any point in [−70, 70] R_E; overtaken measurements omitted MHD · 1D BATSRUS simulation along the Sun–Earth line, integer R_E only L1 · merged dataset at the closest upstream satellite, no propagation

Coordinate system

GSM · x → Sun; y ⊥ Sun and dipole; z: dipole axis, projected GSE · x → Sun; y in the ecliptic, duskward; z ⊥ ecliptic

Data are stored in GSM; selecting GSE rotates them in your browser using per-minute IGRF rotation angles.

Earth orbital motion

Include Earth’s orbital motion · +29.3–30.3 km/s along +y_GSE added to U

The underlying dataset follows the community convention (shared with CDAWeb and OMNI) in which Earth's orbital motion is removed from all velocities: U_y,GSE averages ~0 rather than the ~+29.78 km/s of Earth's true rest frame. By default MIDL restores it: the seasonally exact tangential orbital velocity is added along +y_GSE, rotated into the selected coordinate system, giving the solar wind as seen from Earth (the correct input for Earth-centered models such as SWMF). Untick the box for convention-frame velocities; files state the choice as Earth orbital motion included or Earth orbital motion EXCLUDED; see details.

Propagation target

14 R_E · bow shock nose 32 R_E · SWMF Geospace upstream boundary Custom

The propagated solar wind solution is only valid outside the bow shock. The amber line marks the selected target.

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Daily summary plots