2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/Catalog/MAVEN/SIR_CATALOGUE NASA Catalog High speed solar wind streams and solar wind interaction regions SIR CATALOGUE v1.0 2026-02-02T13:10:23Z 2025-06-25T11:28:59 Only known prior ReleaseDate of the metadata 2026-02-02T13:10:23Z Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB This is the HELIO4CAST high speed stream and stream interaction catalog (SIR), based on in situ magnetic field and bulk plasma observations in the heliosphere. spase://SMWG/Person/Christian.Moestl Author spase://SMWG/Person/Lan.Jian Author spase://SMWG/Person/Maxime.Grandin Author spase://SMWG/Person/Olga.Y.Uritskaya MetadataContact https://helioforecast.space/static/sync/sircat/HELIO4CAST_SIRCAT_v10_header.txt spase://SMWG/Repository/Helio4cast https://helioforecast.space/sircat HTML spase://SMWG/Instrument/MAVEN/SWEA spase://SMWG/Instrument/WIND/SWE spase://SMWG/Instrument/STEREO-A/IMPACT/SWEA spase://SMWG/Instrument/STEREO-B/IMPACT/SWEA SolarWindExtreme 2014-12-03T03:25:00 2017-12-20T01:00:00 sircat_id: sircat_id: The unique identifier for the observed stream interaction region (SIR). unit: string. Housekeeping sc insitu sc insitu: The name of the in situ observing spacecraft. unit: string. Remark sir_start_time sir_start_time: Stream interaction region start time. unit: UTC. Temporal hss_start_time hss_start_time: High speed stream start time, equal to the stream interface time (for STEREO, MAVEN catalogs). unit: UTC. Temporal sir_end_time sir_end_time: End time of the stream interaction region. unit: UTC. Temporal hss_end_time hss_end_time: High speed stream end time, criterion at Wind: speed < 450 km/s. unit: UTC. Temporal hss_vtmax_time hss_vtmax_time: High speed stream maxmimum speed time. unit: UTC. Temporal sc_heliodistance sc_heliodistance: Heliocentric distance of the spacecraft at hss_start_time. unit: AU. Positional sc_long_heeq sc_long_heeq: Heliospheric longitude of the spacecraft at hss_start_time, range [-180,180]. unit: degree (HEEQ). Positional sc_lat_heeq sc_lat_heeq: Heliospheric latitude of the spacecraft at hss_start_time, range [-90,90]. unit: degree (HEEQ). Positional hss_vt_max hss_vt_max: Maximum proton speed from hss_start_time to hss_end_time. unit: km/s. Velocity hss_vt_mean hss_vt_mean: Mean proton speed from hss_start_time to hss_end_time. unit: km/s. Velocity hss_vt_std hss_vt_std: Standard deviation of proton speed from hss_start_time to hss_end_time. unit: km/s Velocity hss_vt_mean hss_vt_mean: Mean proton speed from hss_start_time to hss_end_time. unit: km/s Velocity hss_bt_max hss_bt_max: Maximum total magnetic field from hss_start_time to hss_end_time. unit: nT Other hss_bt_mean hss_bt_mean: Mean total magnetic field from hss_start_time to hss_end_time. unit: nT Other hss_bt_std hss_bt_std: Standard deviation of total magnetic field from hss_start_time to hss_end_time. unit: nT Other hss_bz_min hss_bz_min: Minimum Bz component (SCEQ) from hss_start_time to hss_end_time. unit: nT Other hss_bz_mean hss_bz_mean: Mean Bz component (SCEQ) from hss_start_time to hss_end_time. unit: nT Other hss_bz_std hss_bz_std: Standard deviation of Bz component (SCEQ) from hss_start_time to hss_end_time. unit: nT Other hss_duration hss_duration: Duration of high speed stream from hss_start_time to hss_end_time. unit: hours Temporal ir_vt_mean ir_vt_mean: Mean proton speed from hss_start_time to sir_end_time. unit: km/s Velocity sir_vt_std sir_vt_std: Standard deviation of proton speed from sir_start_time to hss_end_time. unit: km/s Velocity sir_vt_mean sir_vt_mean: Mean proton speed from hss_start_time to sir_end_time. unit: km/s Velocity sir_bt_max sir_bt_max: Maximum total magnetic field from sir_start_time to hss_end_time. unit: nT Other sir_bt_mean sir_bt_mean: Mean total magnetic field from sir_start_time to sir_end_time. unit: nT Other sir_bt_std sir_bt_std: Standard deviation of total magnetic field from sir_start_time to sir_end_time. unit: nT Other sir_bz_min sir_bz_min: Minimum Bz component (SCEQ) from sir_start_time to sir_end_time. unit: nT Other sir_bz_mean sir_bz_mean: Mean Bz component (SCEQ) from sir_start_time to sir_end_time. unit: nT Other sir_bz_std sir_bz_std: Standard deviation of Bz component (SCEQ) from sir_start_time to sir_end_time. unit: nT Other sir_duration sir_duration: Duration of stream interaction region from sir_start_time to sir_end_time. unit: hours Temporal