IPEX’s Mission has Ended

IPEX was launched December 6th, 2013. The last transmission heard from it was on January 30th, 2015. IPEX completed its mission, autonomous image processing and data reduction, fairly early after launch. During the remainder of its functional life, it continued to transmit down health data. With nearly a years worth of health files, the team has been able to observe how the electronics behave in harsh environments. We have learned a great deal from IPEX.

Thank you IPEX for over a year of service! Orbit in Peace.

IPEX_3_1_2015_n1 IPEX_3_1_2015_n2

IPEX_3_1_2015_n3Moon shot!


ExoCube Status Update

ExoCube was launched January 31st 2015 on a Delta II from Vandenberg Air Force Base as a secondary payload.

Since deployment ExoCube has been a little quiet. Unfortunately, the transmit power has been lower than expected. Thankfully there is been great support in the community. SRI has been generous and has allowed us to use their 150′ dish. Members of the Cal Poly team drove to SRI on Sunday (2/8/15) to use the dish for the night and the following morning. We received a significant amount of health and telemetry data from the spacecraft!

The Cal Poly team reviewed the telemetry data and determined that the antenna unfortunately hasn’t deployed. Multiple deploy commands have been sent to the antenna. At some point during shock and vibes testing and the ride up the mechanism broke.

We have been investigating options for long term solutions. The team has investigated ways to still receive important data from the payload with limited data capacity from the satellite. The mission will move on!

Thank you to all the people who have offered their stations to help the mission.

Also thank you Bryan Klofas and Steve Muther for making time in their schedule to operate the SRI dish.

SRI 150' Dish

Jeff Weaver and the dish

John Bellardo and Robert Potter on the 150' Dish

Radio Setup inside the dish.

It’s Alive!

After a amazing launch, the PolySat team returned to the lab at Cal Poly to hear the first signs of life from ExoCube. ExoCube’s RF transmit timer was set for three hours after deployment as a safety precaution to allow multiple antenna deployment attempts to happen on a full battery. The wait for someone to hear us was almost unbearable once GRIFEX and Firebird 3/4 were heard.

Michigan finally picked up a some blips on the correct frequency spaced 45 seconds apart. ExoCube was heard!

Thanks to PE0SAT for the recording and Logan Sisca for the annotation of ExoCube’s Morse code beacon “XO3″.



The first two way communication was also completed tonight.

Cal Poly’s New Ground Station is moving along!

Cal Poly’s third ground station Friis is coming together after significant work by the PolySat lab.

Friis will be able to track LEO satellites and operates at 437MHz and will be capable of achieving significantly higher data rates than Cal Poly’s other two ground stations Marconi and Hertz. The radio transceiver and the the controller processor are identical to the ones on IPEX and ExoCube, the difference is the amplifier on the transmit size will be able to do about 400 watts out through four phased yagi antennas.

Friis Ground Station 10_30_2014

Cal Poly Visits JPL

Wednesday October 15th, NASA JPL hosted an event to celebrating the Cal Poly and JPL partnership. CubeSat and PolySat received much recognition.

Cal Poly’s President Jeffrey Armstrong and the Engineering Dean Debra Larson sat on a panel with JPL to answer questions regarding the CubeSat/PolySat programs and the JPL partnership.


The IPEX team was chosen for a group achievement award from NASA. Thank you everyone for the hard work that went into that mission and the continued work of operating it.


ExoCube Gets Integrated into a PPOD

ExoCube has been delivered!

The ExoCube (CP10) flight model pictured below was delivered to CubeSat for the ELaNa X mission with SMAP. The PPOD with the integrated satellite has passed acceptance testing and will soon be mounted to the rocket.  SMAP will launch in a few months from Vandenberg Air Force Base atop a Delta II.

Exocube is a combined effort of Scientific Solutions, Cal Poly, NASA Goddard, The National Science Foundation, University of Illinois and University of Wisconsin.

ExoCube will characterize [O], [H], [He], [N2], [O+], [H+], [He+], [NO+], and total ion density by taking in-situ measurements within the exosphere, while taking particular interest in orbital locations above various radio observatories.  ExoCube uses an active control system to point itself in the desired direction for measurements, and uses passive control to maintain this orientation.

ExoCubeInt1_half ExoCubeInt2_half

Bill Nye Visits Lab For LightSail Testing

The PolySat/CubeSat lab was visited by a special guest this week. Bill Nye, CEO of the Planetary Society, stopped by Cal Poly to meet with members of the LightSail CubeSat team. LightSail, a 3U CubeSat sponsored by the member-funded organization, has the mission to deploy a 32 square meter solar sail while in orbit. The goal of the visit was to view a deployment test of the solar sail. Unfortunately there were issues that have now pushed back the deployment test to a later date. In addition to hosting the deployment test, the Cal Poly team will be providing environmental testing support in preparation for launch, and operations through the Earth Station after launch. LightSail-A is planned for launch in 2015 and will be used to prove out the design, however solar sailing won’t be attempted until LightSail-B is launched, currently planned for April 2016 on the SpaceX Falcon Heavy.