Output columns, file formats, coordinate system and propagation targets. All vector quantities are in GSM (Geocentric Solar Magnetospheric) coordinates.
| Column | Units | Description |
|---|---|---|
| Bx | nT | IMF x-component (GSM) |
| By | nT | IMF y-component (GSM) |
| Bz | nT | IMF z-component (GSM) |
| Ux | km/s | Solar wind bulk velocity, x-component (radial, negative = Earthward) |
| Uy | km/s | Solar wind bulk velocity, y-component |
| Uz | km/s | Solar wind bulk velocity, z-component |
| rho | cm−3 | Proton number density |
| T | K | Proton temperature |
| Column | Description |
|---|---|
| X | XGSM distance of reference satellite in RE |
| B_source | Source satellite for Bx, By, Bz (coupled) |
| Ux_source | Source satellite for Ux |
| Uyz_source | Source satellite for Uy, Uz (coupled) |
| rho_source | Source satellite for ρ |
| T_source | Source satellite for T |
SOURCE CODES 1 ACE 2 DSCOVR 3 WIND 4 SOLAR-1
When multiple satellites contribute, codes are concatenated in sorted order - 14 = ACE + SOLAR-1, 134 = ACE + WIND + SOLAR-1, 1234 = all four.
Each variable group carries an integer provenance flag recording whether the value at that minute is a direct observation or was produced by gap interpolation. Flag columns are present in L1 and ballistic files (14 RE, 32 RE and custom distances); MHD files do not carry them.
| Column | Description |
|---|---|
| B_interp | Interpolation flag for Bx, By, Bz (coupled) |
| Ux_interp | Interpolation flag for Ux |
| Uyz_interp | Interpolation flag for Uy, Uz (coupled) |
| rho_interp | Interpolation flag for ρ |
| T_interp | Interpolation flag for T |
FLAG VALUES 0 all contributing values direct 1 mixed (interpolated + direct) 2 all contributing values interpolated
Flags 0 and 1 mark minutes where at least one contributing satellite value is a direct observation; flag 2 marks minutes whose value is entirely the product of interpolation. The flag is blank wherever the data value itself is missing.
Space-delimited text file, directly compatible with SWMF input readers. Header includes a title line with date range, a #COORDINATES block, a column-name line, and a #START marker.
MIDL 32Re Data for 2024-05-01 to 2024-05-31
#COORDINATES
GSM
yr mo dy hr mn sc msc bx by bz ux uy uz rho T B_interp Ux_interp Uyz_interp rho_interp T_interp
#START
2024 05 01 00 00 0 0 -7.10 1.19 -9.69 -407.90 -3.13 -20.15 13.0870 28235.0 0 1 1 1 1
2024 05 01 00 01 0 0 -7.08 1.23 -9.66 -406.90 1.00 -13.91 13.3750 30180.0 0 0 0 0 0Merged data files at L1 include additional columns for satellite position and source attribution:
MIDL L1 Data for 2024-05-01 to 2024-05-31
#COORDINATES
GSM
yr mo dy hr mn sc msc bx by bz ux uy uz rho T X B_source Ux_source Uyz_source rho_source T_source B_interp Ux_interp Uyz_interp rho_interp T_interp
#START
2024 05 01 00 00 0 0 5.32 2.14 -8.91 -450.20 15.30 -8.50 2.3400 85142.0 235.41 2 13 13 13 13 0 0 1 0 0Standard comma-separated values with a single header row. Timestamps in ISO 8601.
timestamp,Bx,By,Bz,Ux,Uy,Uz,rho,T,B_interp,Ux_interp,Uyz_interp,rho_interp,T_interp
2024-05-01T00:00:00,5.32,2.14,-8.91,-450.2,15.3,-8.5,2.34,85000.0,0,1,1,1,1CSV files for L1 include the same additional columns:
timestamp,Bx,By,Bz,Ux,Uy,Uz,rho,T,X,B_source,Ux_source,Uyz_source,rho_source,T_source,B_interp,Ux_interp,Uyz_interp,rho_interp,T_interp
2024-05-01T00:00:00,5.32,2.14,-8.91,-450.2,15.3,-8.5,2.34,85000.0,235.41,2,13,13,13,13,0,0,1,0,0nan in TEXT format. Empty string (between commas) in CSV format.
All vectors in GSM. x points Earth→Sun, z is the projection of the magnetic dipole perpendicular to x, y completes the right-handed system.
| Target | Use case |
|---|---|
| L1 | Merged data at the satellite closest to Earth (smallest X) |
| 14 RE | Bow shock nose |
| 32 RE | Standard SWMF upstream boundary |
| Custom | User-specified location along the Sun–Earth line. Any integer in [−70, 70] RE. |
The realtime page serves a preliminary tier built from NOAA/SWPC's real-time solar wind stream, refreshed every minute under realtime/. It differs from the monthly definitive dataset: sources are currently SOLAR-1, ACE and IMAP (no WIND — it has no real-time broadcast; IMAP appears here before it joins the archival product), telemetry is not cross-calibrated, and only SOLAR-1 provides vector plasma — ACE and IMAP contribute scalar speed, density and temperature. Real-time intervals are superseded by the definitive product as monthly processing catches up; the two tiers are never mixed silently.
| File | Contents | Refresh |
|---|---|---|
| realtime_manifest.json | Entry point: names the current generation-stamped payload files below, plus per-source data ages, coverage boundaries (settled_through, definitive_through) and feed status. Fetch this first, uncached. | 1 min |
| last_24h.<gen>.json | Columnar JSON for plotting: implicit 1-min time axis (start + step_s × n), arrays for Bx…T, per-group source provenance, missing values as null. | 1 min |
| sources_24h.<gen>.json | Per-spacecraft raw RTSW on the same implicit time axis (minute-binned, sentinel-cleaned only — no despike/interpolation/time shift). Drives the raw-source column of the Real-Time quicklook; the 7 d/35 d variants back the longer windows. | 1 min |
| sources_{7d,35d}.<gen>.json | 10–15 min | |
| last_7d.<gen>.csv | Merged product at the reference satellite, same columns as the monthly L1 CSVs (timestamp, Bx…T, X, source columns; no interpolation-flag columns in this tier). | 1 min |
| last_35d.<gen>.csv | 10–15 min | |
| IMF_32Re.<gen>.dat | SWMF #SOLARWINDFILE-ready rolling window, ballistically shifted to +32 RE. During vector-plasma outages, rows may carry an operational fill (Ux = −speed, Uy = Uz = 0), counted and flagged in the header. | 1 min |
Rows younger than 3 hours are live (look-ahead filtering still open; values may change), rows 3–27 hours old are settled but still preliminary, and older rows are sealed. Payload filenames change every generation — always resolve them through realtime_manifest.json rather than hard-coding.