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Important notice about STEREO Behind

STEREO In-Situ and Radio Space Weather Beacon Data

Shown here are plots of the latest in-situ particle and fields data from the STEREO IMPACT and PLASTIC instruments, and radio data from SWAVES. The STEREO space weather beacon telemetry mode is a very low rate, highly compressed data stream broadcast by the spacecraft 24 hours per day. These data are used for space weather forecasting. Because the data are produced in real-time, the calibrations may not match those used for the final data product.

Update, 8 July 2015: The IMPACT, PLASTIC, and SECCHI instruments on Ahead were turned off for superior solar conjunction on Friday, 20 March 2015, and the STEREO Ahead spacecraft was reset on Tuesday, 24 March, into the "safe mode" that it was in until 8 July 2015. Please see this link for more information. SWAVES remained on, storing data on the recorder for eventual playback. Real-time SWAVES data started to be available again on 8 July 2015, and the IMPACT and PLASTIC instruments are expected to come back on in a few days. Earlier plots are available through the daily browse pages.

Realtime resources:     Browse resources:

IMPACT/PLASTIC solar wind data
Latest in-situ beacon data
Plot revised: Thursday, 29-Sep-2016 03:17:46 GMT

IMPACT solar energetic particle data
Latest solar energetic particle data
Plot revised: Thursday, 29-Sep-2016 03:17:46 GMT

SWAVES radio data
Latest SWAVES beacon data
Plot revised: Thursday, 29-Sep-2016 03:17:47 GMT

This page should automatically update every 5 minutes. Otherwise, use your browser's "reload" button to get the most recent plot.

Radial-Tangential-Normal (RTN) coordinates are defined such that the +X axis points from sun center through the satellite (radial), and the +Z axis points along the projection of the solar North pole (normal). The +Y axis completes the right-handed coordinate system, and points towards the solar West limb (tangential).

The data on this page include telemetry collected by the following organizations:

  • NASA Deep Space Network
  • National Institute of Information and Communications Technology: Koganei, Japan
  • Centre National d'Etudes Spatiales: Toulouse, France
  • Amateur station DL0SHF, Kiel-Ronne, Germany
  • AMSAT-DL/Bochum Observatory, Germany

We would also like to acknowlege the past assistance from the following organizations:
  • Rutherford Appleton Laboratory: Chilbolton, UK

In addition, we wish to acknowlege

  • Amateur station KA9Q, Phil Karn, for writing and donating the decoding software used at the ground stations.
  • NOAA Space Weather Prediction Center for organizing and scheduling the ground station network.

Last Revised: Thursday, 09-Jul-2015 16:35:54 GMT
Responsible NASA Official: [email address: Joseph.B.Gurman<at>nasa<dot>gov]
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