  The STOC (Science and Technology Operations Centre) simulator of the LPF
(LISA PathFinder) mission is intended to provide a validation tool for the
mission operations tele-commanding chain, as well as for a deeper understanding
of the underlying physical processes happening in the LTP (LISA Technology
Package). Amongst the different physical effects that will appear onboard,
temperature fluctuations in the Electrode Housing (EH) could generate
disturbances on the interferometer (IFO) readouts, therefore they must be known
and controlled. In this article we report on the latest progress in the
analysis at IEEC of the LTP response to thermal signals injected by means of
heaters. More specifically, we determine the transfer functions relating heat
input signals to forces on the Test Masses (TMs) in the LTP frequency band,
from 1 mHz to 30 mHz. A complete thermal model of the entire LPF spacecraft
plus payload, elaborated and maintained at European Space Technology Center
(ESTEC), was used to obtain temperature distributions in response to heat
inputs at prescribed spots (heaters), which are later processed to calculate
the associated dynamical effects on the Test Masses.
