Composite 1

The COMPOSITE SURVEY I covers the 08-16 UT time range (1pixel/60sec) and zooms are 1 hour long (1pixel/10sec).

It is composed of

  1. a spectrum (A)
  2. a display of brightness distribution projected onto the heliocentric East/West or North/South direction versus time at 150/164MHz (B)
  3. a position of CMEs detected by SOHO (C)

Multi-instrument Spectrum (A)

Frequency range 600 MHz-20 kHz. Logarithmic scale.
Combines data obtained with :

Instruments_composite1
InstrumentFminFmaxTime resolutiondate
Waves RAD1 20 KHz 1 MHz 1 min
Waves RAD2 1.04 MHz 13.8 MHz 16 sec
DAM 20 MHz 70 MHz 1 sec
Artemis 70 MHz 600 MHz 5 sec Until 01 nov 2012
ORFEES 70 MHz 1000 MHz 1 sec Since 01 nov 2012
Humain Callisto 45 MHz 447 MHz 0.25 sec Since 01 July 2016
Humain ARCAS 45 MHz 450 MHz 84 msec Since 01 Jan 2017
Humain HSRS 275 MHz 1495 MHz 0.25 sec Since 15 oct 2015

Note : When DAM is unavailable, Artemis is used also for the frequency range from 20 MHz to 70 MHz or Humain since 1st july 2016.

EW and NS brightness distribution versus time (B)

150 MHz (164 MHz before 01 Dec 2006)

  • Integration time : 10s (1 point/ 60s)
  • Each frame contains a display of brightness distribution projected onto the heliocentric East/West or North/South direction versus time ; the units of the vertical axis are solar radius.

Coronal Mass Ejections (CMEs) (C)

The CMEs are reported in the composite1 survey from 08 to 16 UT.

  • Time of appearance in SOHO/LASCO C2 and direction (arrow)
  • Speed V(First order, km/sec), angular width W(deg)
  • Black: detected in C2 and C3
  • Grey: detected in C2 only