  The magnetosphere sustained by the rotation of the Earth's liquid iron core
traps charged particles, mostly electrons and protons, into structures referred
to as the Van Allen belts. These radiation belts, in which the density of
charged energetic particles can be very destructive for sensitive
instrumentation, have to be crossed on every orbit of satellites traveling in
elliptical orbits around the Earth, as is the case for ESA's INTEGRAL and
XMM-Newton missions. This paper presents the first working version of the
5DRBM-e model, a global, data-driven model of the radiation belts for trapped
electrons. The model is based on in-situ measurements of electrons by the
radiation monitors on board the INTEGRAL and XMM-Newton satellites along their
long elliptical orbits for respectively 16 and 19 years of operations. This
model, in its present form, features the integral flux for trapped electrons
within energies ranging from 0.7 to 1.75 MeV. Cross-validation of the 5DRBM-e
with the well-known AE8min/max and AE9mean models for a low eccentricity GPS
orbit shows excellent agreement, and demonstrates that the new model can be
used to provide reliable predictions along widely different orbits around Earth
for the purpose of designing, planning, and operating satellites with more
accurate instrument safety margins. Future work will include extending the
model based on electrons of different energies and proton radiation measurement
data.
