Masahiro Arai JN1GKZ reports CubeSats may be deployed from the International Space Station (ISS) on September 17.
On the AMSAT Bulletin Board he writes:
JAXA has announced CubeSats will deploy from the ISS via the J-SSOD on 17th September but the CubeSat name is not shown in the announcement. However, NASA’s ISS On-Orbit Status Report 09/09/15 shows the following:
JAXA-Small Satellite Orbital Deployer (SSOD) #4 Install: Kelly installed the J-SSOD#4 on the Slide Table with the Multi-Purpose Experiment Platform (MPEP) attached. The J-SSOD #4 has two satellites that will be deployed next week. The first satellite is designed to observe the Ultraviolet (UV) spectrum during the Orionid meteor shower in October. The second satellite, sponsored by the University of Brasilia and the Brazilian government focuses on meteorological data collection.
So, the first one must be S-CUBE and the second is SERPENS.
SERPENS operates in the amateur band. The SERPENS Amateur Radio page shows these downlink frequencies:
145.980 MHz using GFSK modulation at 9600 bps and AX.25 protocol
437.365 MHz using CW/MSK modulation at 1200 bps and CSP protocol
S-CUBE seems not to operate in an amateur band.
SERPENS Amateur Radio page http://www.aerospace.unb.br/serpens_radioamateurs