PDS_VERSION_ID            = PDS3
LABEL_REVISION_NOTE       = "
    2018-08-10, Maud Barthelemy first draft."
RECORD_TYPE               = STREAM

OBJECT                    = INSTRUMENT
  INSTRUMENT_HOST_ID      = "RO"
  INSTRUMENT_ID           = "SREM"

  OBJECT                  = INSTRUMENT_INFORMATION
    INSTRUMENT_NAME       = "STANDARD RADIATION ENVIRONMENT MONITOR"
    INSTRUMENT_TYPE       = "PARTICLE DETECTOR"
    INSTRUMENT_DESC       = "



      The SREM description can be found on the http://srem.web.psi.ch web
      page and also detailed below.


Instrument Overview
========


Specifications
--------

NAME:                    SREM (Standard Radiation Environment Monitor)
DESCRIPTION:             particle detector, developed for space applications
                         measuring high energy electrons and protons
PRINCIPAL INVESTIGATOR:  Hugh Evans, Petteri Nieminen

ENERGY RANGE:            electrons 0.5 MeV (minimum)
                         protons    10 MeV (minimum)
ANGULAR RESOLUTION:      20 degrees

ENERGY LEVELS:          15 bins

Dimension                96 mm x 122 mm x 217 mm
Weight                   2.5 kg
Power consumption        2.5 W

Description
--------

SREM is a particle detector, developed for space applications. It measures
high energy electrons and protons with a fair angular and spectral resolution
and provides the host spacecraft with radiation information.
SREMs was launched on several satellites: Strv-1c, Proba-1, Integral,
Rosetta, GIOVE-B, Herschel, Planck, and additional missions are to follow.
SREM is the successor of the Radiation Environment Monitor REM.

SREM was developed and manufactured by oerlikon space in cooperation with Paul
Scherrer Institute under a development contract of the European Space Agency.


Calibration
========

An essential input for the interpretation of the detection rates, in terms of
particle fluxes, are the energy dependent response functions. Therefore, prior
to launch, the instruments are fully calibrated at the Proton Irradiation
Facility, (PIF) of Paul Scherrer Institut (PSI)[HAJDASETAL1996].
In addition, the instrument and the host spacecraft are simulated with
the Geometry and Tracking (GEANT) 3.21 and GEANT4 particle transport codes
to accurately determine the response functions to electrons at energies
between 0.3 and 15 MeV and to protons in the 8-800 MeV range.

Design modularity
=================

The Standard Radiation Environment Monitor houses the following functional
blocks:
   - Power supply with DC/DC converter with output voltages for the digital
   and the analog circuits, as well as for the detectors.
   - Three particle detectors with associated temperature sensors integrated
   in the detector housing.
   - Analog front end with low noise signal amplifiers and signal
   conditioning electronics.
   - Comparators with fifteen detection ranges.
   - Interface for remote total dose and temperature measurement sensors.
   - Signal processing electronics with host spacecraft interface for:
        1. Data processing and storage of scientific data
        2. Acquisition of housekeeping data and system health monitoring
        3. Telemetry and telecommand interface with host spacecraft.



"
  END_OBJECT              = INSTRUMENT_INFORMATION

  OBJECT                  = INSTRUMENT_REFERENCE_INFO
    REFERENCE_KEY_ID      = "HAJDASETAL1996"
  END_OBJECT              = INSTRUMENT_REFERENCE_INFO

END_OBJECT                = INSTRUMENT

END