1. Psat USNA-0601 ParkinsonSAT Remote Data Relay (Psat) or
DOD Space Experiments Review Board (SERB) Oct 2008 or
Psat
Bob Bruninga
Midn Cory Ridge
US Naval Academy Satellite Lab
Sponsor: ONR , Aerospace Corp
Ocean Buoys w/ RF Terminals
Title
Name of ParkinsonSAT is in honor of Dr Parkinson of GPS fame and a USNA grad
Briefed before as a 1 cubic foot freeflyer or an attached payload
TRANSITION: This year our objective is to re-design for a CUBESAT launch
GROUND
STATION
Data Exfiltration
UNCLASS

2. Cubesat Design Works Too!
Psat
USNA-0601
2008 ParkinsonSAT CUBESAT
Cubesat Design Works Too! 7”
This then is our 2008 Cubesat approach using a pair of 1.5 unit cubesats with deployable solar panels.
Most of our original primary mission objectives can still be met but we can now only support small SERB payloads.
Our COTS solar arrays cost $360 compared to about $25,000 from a commercial “cubesat” vendor.
Same 5W transponders (2)
Same sun pointing ADCS
Other SERB Payloads
All COTS solar panels
reduced
$360 / ($25,000)
Vandegriff
11/11/2018
2008 DOD SERB

3. Aux Payload Space Available!
Psat
USNA-0601
2008 ParkinsonSAT CUBESAT
Aux Payload Space Available! 7”
The mechanical design allows for the clean integration of up to 39 cubic inches of auxilliary payload inserted with little integration from the bottom.
The Payload has access to the bottom external surface of up to 16 square inches on the anti-Sun face.
The only restriction is the ¼ inch donut hole through the middle for our antenna mechanism (TBD)
Batteries are mounted on the circumference for best moment of intertia about the Z spin axis- and closest to the sun end to minimize the other moments for better stability.
39 cu.in for Aux Payload(s)
Dark side 4” square surface
.5 kg – self contained
1W average power
Donut hole (1/4”) for antenna
Vandegriff
11/11/2018
2008 DOD SERB

4. Psat (USNA-0601) Experiment Concept!
Objective:
Education of the future Navy Space Cadre…
Transponder for low cost data exfiltration.
Low cost COTS Solar Panels for Responsive Space
Low Cost Cubesat Launch and bus system
Small AUX Payload space for small SERB experiments
Description: Free-Flyer /Piggyback
VHF Data Transponder
Remote Data Relay
w Global Internet Gateways
Draw from education experimenters
Scaleability and Constellation
9 dB link advantage to UHF
Using low cost COTS
Bus support for other Serb Payloads
ODTML UHF transponder
UHF RFI Mitigation
MIDN Radiation Sensor (usna)
Dragon particle detector (usna)
Objectives ***
Description *** then  global internet volunteer ground stations (as shown here…)
Complementary Experiments… provides continuity…to users… using the…. And… low cost systems.
Previous Priority
Previous Priority:
48 of 51 DoD
30 of 30 DoN
Complementary Experiments:
Provides continuity to xponders of PCSATs, ANDE, RAFT, GO-32etc
Common AX.25 protocol at 1200/ 9600 baud
Off the shelf $500 RF systems exist and space proven. $30 solar panels
11/11/2018
2008 DOD SERB

5. CUBESAT Deployment Psat USNA-0601 11/11/2018 2008 DOD SERB
NEW: The pair of cubesats gives us dual-redundant mission and greater connectivity.
First one is deployed “upside down” so that the solar panel deployment force adds to the separation force.
Second one deploys “right-side-up” but array deployment retards velocity for better separation.
Midn Ridge
11/11/2018
2008 DOD SERB

6. Psat (USNA-0601) Technology & Development!
Major Instrument or Equipment:
Psat VHF transponder for data exfiltration
Educational “Force Tracking”
Bus support for other small SERB experiments
Instrument or Equipment Operation:
Dual uplink TDMA data receivers
Aloha, Slotted Aloha, and file store/forward
Low cost COTS solar panels for responsive space
Low cost CUBESAT for multiple opportunities
Sun pointing for lower cost solar power system
Low cost attitude control +/- 40 degree requirement
Experiment Funding:
1st two Paragraphs and bullets in order… then
Funding is very small by space standards, but is on the same order as 5 of our previous successful missions.
All hardware is COTS and space proven via some of our previous spacecraft
Hardware Status:
All technologies are mature and off the shelf
Have space heritage (PCSAT, ANDE, RAFT)
PDR: Fall 2008
Flight Ready: Fall 2009
11/11/2018
2008 DOD SERB

7. Psat (USNA-0601) Military Relevance!
Military Needs:
Education and experience for future naval officers in the space cadre
DOD Schools: Service Academies (4)
Graduate Institutions (3)
ROTC Units (550 Schools)
DOD Comms Cadre: Civil Air Patrol (1800 units)
Military Affiliate Radio Stations (8000)
US Coast Guard Auxiliaries (33,000)
Data Exfiltration and service to low power/low-priority users
Tactical situational awareness and constellation support
COTS testing for Responsive Space & other small SERB experiments
Ocean Buoys w/ RF Terminals
GROUND
STATION
Documentation:
USSpaceCom Long Range Plan, p77-79 – education- space cadre
NDAA (P.L ) Directs …Ocean Research and Sciences
CNA study (June 04) identifies data exfiltration requirement
Military needs …. Education of students at these schools and other DOD members of the comms cadre…
Then the next three bullets . . .
Documentation: The need for Education of the space Cadre and for the data exfiltration mission are well documented.
USNA has not only has the satellite capability, the ground station, but also the mobile platforms for many experiments
11/11/2018
2008 DOD SERB

8. Psat (USNA-0601) Flight Requirements!
Need for Spaceflight: Medium is the message
Future Officer Aerospace Education – space cadre
Remote Data Relay requires Comms orbit.
Space Performance of COTS required
Space environment needed for aux payloads
Requested STP Services
Launch Services
Launch Integration
Our requirement is for access to space… the medium is the message ***
We are requesting STP launch and integration services (Space Test Program)
We will take just about any free flyer or piggyback orbit that will give us a reasonable comms altitude and at least 5 year life that we can see from USNA (inclination from 20 to 98 degrees).
For this free-flyer, an ISS ride is not desired.
Experiment / Flight Data:
Free-Flyer or Piggy-back or cubesat
Apogee/Perigee: 400 to 800 km (>5 yr life)
Inclination: 20 to 98 deg (lower, if higher)
Physical Data: .02 m3, 20 kg, nominal 20 W
Shuttle/ISS Required: [No]: Acceptable: [No?]
Experiment Retrieval Required: [No]
Repetitive/incremental step flights: [No]
11/11/2018
2008 DOD SERB

9. Psat (USNA-0601) Technology Transition/Data Application Plan!
Psat (USNA-0601) Technology Transition/Data Application Plan
Data Application Plan
Data from all experiments available live via Internet from global ground stations
AX.25 Data/formats handled transparently by Satellite and Global Infrastructure
New-User, New Experiment, New Data transparently accommodated instantly.
Global infrastructure tied into Google maps and satellite images
Global infrastructure has existing WEB telemetry displays built-in.
Our downlink will be available to all experimenters and schools via our global network of volunteer ground stations.
Any other experimenters may use our transponder for their own formats and data requirements
So long as they use the AX.25 protocol
11/11/2018
2008 DOD SERB

10. Sensor Buoy Baseline (prototype)
Psat
USNA-0601
Sensor Buoy Baseline (prototype)
2006 2 8
We have established the baseline for our systems both on the ground and in space.
The electronics in our 2006 prototype buoy… was reduced this summer by nearly a factor of 50 in volume in a new design shown here.
We hope to make similar reductions in Psat’s comms and data hardware to transition to a CUBESAT design
See Buoy Location and Telemetry at
Piggrem
11/11/2018
2008 DOD SERB

11. Buoy Network Baseline Psat USNA-0601 PCSAT validates our links
PCSAT2 User Plot 18 Apr 06
We have demonstrated our link performance and global connectivity with our previous SERB satellites
This is a one day snapshot on 18 april 2006 of PCSAT2 users worldwide.
11/11/2018
2008 DOD SERB
Vandegriff

12. Buoy Link Verification Test
Psat
USNA-0601
Buoy Link Verification Test
In 2006 we took advantage of our PCSAT1 free flyer and PCSAT2 (ISS) to give us a constellation of two, yielding as many as 11 hits per day from our prototype buoy.
Notice that the hits per day from the free flyer were higher than from the ISS (interference issues?)
You will also notice that PCSAT-1 went back into hybernation on the 24th which significanly cut our success rate.
11/11/2018
2008 DOD SERB

13. #A #B cubesat Psat USNA-0601 aux payloads 11/11/2018 2008 DOD SERB
Appologize for the complexity of this slide,
but the two redundant (A and B) transponders (with 2 rx and 1 TX each) can be seen here.
We can add to them the aux payloads circled in green.
Or we can trim it down to just a single RX, TNC, TX to fit in a cubesat and still meet most of the primary objectives
aux
payloads
11/11/2018
2008 DOD SERB

14. Sun Pointing Attitude Control System
Psat
USNA-0601
Sun Pointing Attitude Control System
Pointing requirements are relaxed +/- 40 deg
High precision attitude control not required
Cubesat
4.5W
(9W TJE)
1.5W
ODTML on (18W)
The image here is of our $50 COTS three axis magnetometer (good to 1 degree or better)
The plot shows how we can wobble as much as +/- 40 degrees and still have 85% of peak power
With the full size Psat we can support ODTML when sun pointing and survive even if upside down
In a sun pointing cubesat with deployed panels we can still operate the Xponder at full power (without ODTML)
And we can operate in safe mode if upside down with at least 1.5W of safe power.
ODTML off (4.5 W)
SAFE mode
Paquette
11/11/2018
2008 DOD SERB

15. P-sat Sun Pointing Test
USNA-0601
P-sat Sun Pointing Test
$9000
2008: Sun Pointing Design Works!
Full capacity transponders
ODTML Transponder
Other SERB Payloads
ADCS advantage
Further qualification of COTS solar panels for responsive space
$100
As briefed last year, we would use space rated cells on our +Z axis and keep it sun pointing,
but cover the rest of the satellite with our COTS PCSAT style solar panels for only 2% of the cost.
The bottom graphic shows our telemetry and display system of the spacecraft attitude control system
And a mat lab simulation showing sun pointing stability within an orbit or so
ADCS Demo’ed
Vandegriff
11/11/2018
2008 DOD SERB

16. Psat
USNA-0601
Questions?
1G - 1 Axis Test/Demo
2008
So, while waiting for a launch opportunity, we have made progress towards ParkinsonSAT
Beginning with 3 of our previous VHF transponder satellites
to our first buoy in 2006,
our ADCS demo in 2007
and now our 2008 microminiaturized buoy and our transition to our CUBESAT design.
Questions?
2007
2006
11/11/2018
2008 DOD SERB

17. BACKUP SLIDES
Backups
11/11/2018
2008 DOD SERB

18. P-SAT (USNA-0601) Intro and Background
Psat transponder can draw from thousands of experimenters for large scale experiments. A larger spacecraft can support other small SERB experiments.
Multiple transponders on smaller picosats can form a constellation for greater coverage and reduced latency.
1st bullet… then … this map shows the number of USA users and experimenters of our AX.25 data channel that are available to us… this is the terrestrial network, but any of these users can switch to our uplink with a click turn of their frequency knob.
2nd bullet… 3rd bullet…
The Mars Society is an arctic outpost that has a WX station that uplinks to our system
Not only the sensors and users exist, but the global Internet collection and distribution system also exists from PCSAT1 & 2.
11/11/2018
2008 DOD SERB

19. Other Possible SERB experiments?
Psat
USNA-0601
Other Possible SERB experiments?
1cuft (spacecraft)
UHF RFI Mitigation
MIDN - Micro Dosemeter
Radiation Detector array comparable to human cell dimensions
Still possible
Dragon
Particle
Impact
Detector
Some examples of other SERB payloads that we can support are…
MIDN and DRAGON are other USNA payloads
simplified
11/11/2018
2008 DOD SERB

20. Full Size Psat Separation Device
USNA-0601
NEA Separation Device
The full size Psat would use a simple separation system based on a single NEA separation bolt.
Simple / Proven
11/11/2018
2008 DOD SERB

21. Fullsize Psat Internal Structure
USNA-0601
Internal Bulkhead
4 Payload Bays
NEA Location
Battery Cells
This is the original structural design of the full size Psat which contains four payload bays.
Our dual transponders and other USNA payloads would take two of the bays
And the other two are available for other SERB experiments
Solar Panel
Structural and Thermal balance
11/11/2018
2008 DOD SERB

22. Prototype Buoy Data This data is LIVE Psat USNA-0601
Google for “USNA Buoy” Select USNA-1
Buoy-4 came “home”
This data is LIVE
Since all the data is distributed via the internet it is seamlessly integrated with google maps and satellite views.
On the left was the plot from out 2006 buoy experiment and on the right is the final position of Bouy4 this summer.
It was deployed a mile up river, but came to rest *under the office* of the Oceanography tech that deployed it!
11/11/2018
2008 DOD SERB

23. Prototype Buoy Data Psat USNA-0601 Google for “USNA Buoy”
Select USNA-1
(or Buoy4)
Due the popularity of our global volunteer data network, existing applications have been written to automatically scale and plot data using any browser.
The academic environment is conducive to a lot of free labor and contributing effort.
11/11/2018
2008 DOD SERB