PEACE operations history key

Note - this information is reproduced/adapted from the official PEACE operations web-site:
www.mssl.ucl.ac.uk/www_plasma/missions/cluster, and was correct at the time of writing. For an up-to-date version, please visit the website

The experiment mode can be summarised by a string, each section of which describes some aspect of the operation of PEACE:

AmB-CmD-cplrstxyf-apl-XwZ

The first two sections describe the energy coverage of HEEA and LEEA. Here HEEA is operating from level A to B, and LEEA from C to D. The next section describes how the DPU is generating moments (note that all codes have been shown in the above example, but this is only for completeness. In reality PEACE will be operating with some combination of these). The codes can be summarised as follows:

c	CORE	includes moments
p	PAD	pitch angle data
l	LER	reduced resolution low energy data
r	3DR	reduced /8 resolution data from HEEA and LEEA
s	3DR	reduced /8 resolution data from LEEA only
t	3DR	reduced /8 resolution data from HEEA only
x	3DX1	reduced by variable degree resolution 3D data, one sensor
y	3DX2	second 3DX in same spin
f	3DF	full resoltion 3D data from HEEA and LEEA

Note that these operation codes appear in order of precidence. The final sections describe how the 3DX data is being calculated.

a	all azimuths (t for 2 azimuths, cartwheel slice)
p	adds together pairs of anodes (e for pairs of energy bins, n for no summing)
l	data from LEEA (h if from HEEA)
XwZ	3DX data contains a subset (levels X to Z) of the range covered by LEEA/HEEA.
nw	`no window' - there was no subsetting of energy levels

As an example, consider the operations code:

88m28-60m00-cplxt-apl-60w08

Here we can tell that HEEA was operating between levels 88 and 28 and LEEA was operating between levels 60 and 00. CORE data (c) was transmitted along with pitch angle data (p) and reduced resolution low energy data (l). There are reduced resolution 3DX moments from one sensor (x) and reduced angular resolution 3DR moments from HEEA. The 3DX moments are summed over all azimuths (a) and pairs of anodes (p) and the data comes from LEEA (l). Energy levels 00 to 08 are discarded.