  In this paper we propose indirect probes of the scale of supersymmetry
breaking, through observations in the Extreme Universe Space Observatory
onboard Japanese Experiment Module (JEM-EUSO). We consider scenarios where the
lightest supersymmetric particle is the gravitino, and the next to lightest
(NLSP) is a long lived slepton. We demonstrate that JEM-EUSO will be able to
probe models where the NLSP decays, therefore probing supersymmetric breaking
scales below $5 \times 10^6$ GeV. The observatory field of view will be large
enough to detect a few tens of events per year, depending on its energy
threshold. This is complementary to a previous proposal (Albuquerque et al.,
2004) where it was shown that 1 Km$^3$ neutrino telescopes can directly probe
this scale. NLSPs will be produced by the interaction of high energy neutrinos
in the Earth. Here we investigate scenarios where they subsequently decay,
either in the atmosphere after escaping the Earth or right before leaving the
Earth, producing taus. These can be detected by JEM-EUSO and have two
distinctive signatures: one, they are produced in the Earth and go upwards in
the atmosphere, which allows discrimination from atmospheric taus and, second,
as NLSPs are always produced in pairs, coincident taus will be a strong
signature for these events. Assuming that the neutrino flux is equivalent to
the Waxman-Bahcall limit, we determine the rate of taus from NLSP decays
reaching JEM-EUSO's field of view.
