1. ISS Ham ARISSat-1 Payload Safety Review Panel
Technical Interchange Meeting
October 29, 2009

2. SuitSat-1 History
SuitSat-1/Radioskaf-1 was a simple satellite made from a surplus Russian Orlan spacesuit fitted with a single beacon amateur radio transmitter that ran on Russian spacesuit batteries. It had no capability to receive commands and was destined to live only a short while because it had no solar panels to replenish its batteries.
Primary mission
Voice message Commemorating the 175thAnniversary of Bauman state University Moscow.
This included audio greetings from Energia, Bauman State University, ARISS Europe, ARISS Canada, ARISS U.S.A., ARISS Japan
A CD ROM with photos contributed from schools around the world.
Secondary mission
SSTV images of Earth and Station
Amateur operations
Packet ops
Beacon
Earth sensor test data
Gather real space operating data and experience on several candidate sensors for Eagle.
SuitSat-1/Radioskaf-1 caught the attention and fascination of the world, garnering a large amount of newspaper, magazine, radio and TV reporting. Even more importantly, SuitSat-1 captured the imagination of students and schools! SuitSat/Radioskaf-1 attracted nearly 10 million hits to the Suitsat website during its mission!
Plans were developed to produce a second SuitSat/Radioskaf.
SuitSat-2/Radioskaf-2 was based on SuitSat-1 successes but with enhancements, such as amateur radio transponders.

3. ARISSat-1 History
Due to storage considerations on the International Space Station, the two surplus Orlan space suits in storage on the International Space Station were discarded via the Progress Cargo Vessel. One of these suits was to be used to house the electronics for the upcoming SuitSat-2 mission where the batteries were to be mounted inside the suit, solar panels attached to the extremities with the electronics, video cameras and antenna mounted on the helmet by the ISS crew prior to deployment during an EVA.
The ARISS International Team was informed that there is still space available for shipment of the SuitSat-2 electronics on the projected cargo flight to the Space Station in January 2010 and the EVA scheduled for April 2010 still has a 'SuitSat-2' deployment scheduled. 
The AMSAT team developing SuitSat-2 electronics on behalf of ARISS International is focusing on completing development in anticipation that deployment will still take place in Spring 2010 using a new structure to house it. In addition, the experiment being developed by Russia's Kursk State University is still expected to be integrated into the electronics once the US produced equipment is delivered to Russia.

4. Suitsat 1 Ready for Deployment

5. ARISSat-1 Planned Mission and Capabilities
Primary Mission
Commemorative and Educational Voice Messages.
Includes audio greetings from Energia, ARISS Europe, ARISS Canada, ARISS U.S.A., ARISS Japan
Secondary Mission
Kursk University Experiment
Testbed for systems planned for future Amateur radio satellites
Amateur operations
CW ID
ARISS Callsigns
Packet ops
Transponder
SSTV Images of Earth and Station

6. The Proposed Plan Enhance Suitsat-1 design
Re-use safety interlock circuit with update for Solar panels
Transmitter and Receiver Module
IHU Module
Control Panel same as Suitsat-1
Solar Panels
New Power Module for Solar Panels
Up to Four Experiments
Temperature, Voltage, and Current Telemetry
Up to Four cameras for SSTV

7. Future Concept Testbed
Use as a test bed for new concepts for future Amateur Radio Satellites.
Power System
Max power point converters for solar panel
Distributed Converters
Distributed Storage system
Software Defined Radio (SDR) Prototype
Educational Balloon Flights
Additional experiments

8. SSTV SSTV Four video ports
No power until switched on just before data take.
Four U.S. Supplied
No blank video
Processor examines video and skips if no image present

9. Radio Module Radio SDR prototype Multimode
SSB Crossband (U/V) Transponder repeater
Telemetry beacon CW
BPSK
Multiple signals simultaneously

10. Experiments Four Experiment ports Kursk University Experiment
Measure vacuum environment in vicinity of satellite
Experiment sampled once per orbit
Experiment must run on +5V ≤ 100ma
Experiment powered for 90 min/orbit
Collect up to 2k of data
Then 2k of data downloaded to IHU for 2 seconds, then Exp powered down
Data transmitted in BPSK data stream with Telemetry

11. ARISSat-1 Subsystems
Major Subsystem Modules and Changes from Suitsat-1:
Safety circuit and arming switches - now mounted to the structure +Z surface
IHU enclosure - re-engineered to allow better cable connection and placement
IHU - Integrated Housekeeping Unit - the main computer stays the same
SDX - Software Defined Transponder - stays the same
PSU - Power Supply Unit - board separated into Max Power Point Tracker boards and Power Supply board
ICB - Interconnect Board - re-laid out the circuit board to adapt the connectors to new enclosure layout
TX and RX modules - simply separated from the video enclosure and antenna
2m/70cm antenna - separated and re-designed, changed to two monopole antennas
Video cameras - separated from the helmet enclosure and mounted to the structure
Russian Ag-Zn battery - now mounted to a plate and inserted into the structure
Kursk State University Experiment - now mounted to the satellite structure
Solar Panels - the six panels are now on all sides of the structure

12. ARISSat-1 Block Diagram

13. ARISSat-1 System Diagram

14. Power Diagram

15. ARISSat-1 General View

16. ARISSat-1 General View with Covers

17. ARISSat-1 General View Interior

18. ARISSat-1 Assembly

19. ARISSat-1 Assembly

20. ARISSat-1 Progress Interface

21. ARISSat-1 Progress Interface

22. ARISSat-1 Structure Assembly Step One

23. ARISSat-1 Structure Assembly Step Two

24. ARISSat-1 with Solar Panel Covers Top Iso View

25. ARISSat-1 with Solar Panel Covers Bottom Iso View

26. Inhibits for Solar Panel Covers
Six Covers: 18” x 9.75” x 1/8” thick (469.9 x x 3.17 mm) aluminum
3 inhibits:
Four T-handle quick-release pins with lanyards
Velcro straps around Covers
Velcro squares to Solar Panel

27. +Y Solar Panel Cover Exterior (some details vary panel to panel)
Finger Loop
Finger Loop
Loop
Loop
Fabric Strap
Velcro
Pouch or flap
To store T-handle
Quick-release pins
Velcro
Loop
Loop
Fabric Strap
Finger Loop
Finger Loop

28. Solar Panel Cover Interior
Hooks
Hooks
Hooks
Hooks
Hooks
Hooks
Hooks
Hooks
Hooks
Hooks

29. Solar Panel Exterior

30. Covers Are Strapped Together+Z -Y +X +Y -X -Z

31. Cover Procedure
1. (IVA) Remove all or half of the 4 pins per each of 6 Covers. Place pins in
respective Panel’s pouch or under flap. 2. Exit through Hatch. 3. (EVA) Remove remaining 2 pins per each of 6 Covers (if required). Place in respective Cover’s pouch or under flap. 4. Remove long strap holding +Z Top Cover. Do not remove the 2 short straps which form hinge. 5. Pull +Z Top Cover (additional velcro), rotate, and secure back-to-back against adjacent Side Cover. 6. Remove long strap holding –Z Bottom Cover. Do not remove the 2 short straps which form hinge. 7. Pull –Z Bottom Cover (additional velcro), rotate, and secure back-to-back against adjacent Side Cover. 8. Release ends of straps holding Side Covers (the overlap is at corner –X –Y). 9. Pull Side Cover (additional velcro), rotate and secure back-to-back against adjacent side Cover. 10. Repeat step 9 for remaining side Covers.

32. Solar Power System NASA supplied.
Surplus from previous NASA SMEX (SMall EXplorer) satellite program.
Charge the surplus ISS Russian Space Suit (now ARISSat) batteries.

33. SMEX Solar Panel

34. Safety Circuit
The ARISSat-1 Safety Circuit is in place to protect crew from possible hazards. The two major functions this circuit helps perform are:
power isolation and
block RF transmission until the suit is far enough away from any EVA crew to pose any hazards
The system will prevent RF transmission and battery charging for
approximately 15 minutes after the switches are thrown.

35. Functional Overview
The Safety Circuit is controlled by the Safety Switch box.
The Switch box is the Crew interface to ARISSat-1.
Consists of three switches and several LEDs
Each switch enables a stage in the protection system.
For ARISSat to be fully operational, a specific amount of time has to elapse after the throwing of all three switches.

36. Changes from Suitsat 1
This circuit performs the same basic functions as the Safety Circuit on Suitsat 1, but with several improvements and functional additions:
An interface to the Suitsat2 Command Decoder was added, allowing the entire system to be reset via a ground station command.
Support for Solar Panel power inputs was added.
Separate power supply controls were implemented to allow Suitsat 2 to take pictures of the Crew and International Space Station as the satellite is pushed off. This includes the 25 second timer, which is used for both the Command Receiver and initial power on.
The ESD robustness was improved significantly.
Power consumption of just the safety circuit was dropped from approximately 90mW on Suitsat 1 to approximately 2.5mW.
Out of spec conditions present on the Suitsat 1 safety circuit were eliminated.
Separate Oscillators were implemented for both Timer1 and Timer 2

37. ARISSat-1 Safety Switch Box

38. Safety Box Block Diagram

39. Inhibits and Controls Power Switch RF Enable Enable Timer 1
Isolate battery and solar panels
Power to safety timers
RF Enable
Enable Timer 1
Timer 1 – 8 minutes
System timer – 25 seconds
Powers Integrated Housekeeping Unit, Power Supply Unit, and Command Decoder
Allows video
Enable Timer 2
8 minutes
Crew activated
Enable push to talk
Command Decoder
SDX Push to Talk
Power via IHU

40. Timer Sequence

41. Power Switch and Isolation Relays

42. Isolation Relay States

43. LED Description

44. LED Description LED1: 28V Power (Yellow) LED2: T1 Counting (Yellow)
When lit, Indicates that the power switch has been turned on and power is supplied to the safety circuit and the PSU.
LED2: T1 Counting (Yellow)
When blinking, indicates that Timer1 is operating and counting off time
LED3: T2 Enabled (Yellow)
When blinking, indicates that Timer 2 is enabled. The time interval will not yet be started if Timer1 has not completed yet
LED4: T1 Safe (Green)
Lit when the Timer 1 Switch is in the Safe Position
LED5: T2 Safe (Green)
Lit when the Timer 2 Switch is in the Safe Position
LED10: PTT Safe (Green)
Lit when the Push to Talk line to the RF transmitter is not activated.
LED6: Solar Safe (Green)
Lit when the Solar panels are isolated from the main power bus, if power is supplied to the safety circuit
LED7: RF Power (Red)
Lit when the power is supplied to the RF Transmitter.
LED8: IHU (Yellow)
Lit when the IHU has indicated that is up and operating by turning on the PSU’s 8V output
LED9: PSU (Yellow)
Lit when the PSU is generating +5V for the system from the 28V bus

45. Suitsat 2 IHU and Core Module

46. SuitSat-2 Internal Housekeeping Unit (IHU) Block Diagram
SD Card
To Power Controller
SPI
I2C
16MB SDRAM
CPLD
Microcontroller
PMP
SPI
To SDX
I2C
Video Input Processor
RS-485 1 2 3 4 1 2 3 4
To Cameras
To Experiments

47. SuitSat-2 Software Defined Transponder (SDX) Block Diagram
QSD
CODEC
dsPIC33F
IF IN
10.7 MHz IF
SPI to IHU
QSE
IF OUT I Q LO
42.8 MHz LO

48. Suitsat 2 SDX

49. ARISSat-1 Control Panel

50. Suitsat 1 Antenna

51. ARISSat-1 Receiver

52. ARISSat-1 Receiver

53. ARISSat-1 Receiver

54. ARISSat-1 Transmitter

55. ARISSat-1 Transmitter

56. Hazard Analysis Potential Hazards Structures Electrical Circuits
Battery Charging
Mating/Demating Powered Connectors
RF Transmission
IVA/EVA Operations
Sharp Edges

57. Crew Safety Sharp Edge Protection
All components designed to meet sharp edge safety requirements
Inspection for all external parts
Temperature Extremes
No hot/cold sources
No pinch points

58. Materials Comply with MSFC –SPEC-522 Non-flammable Offgassing tests
Materials list reviewed by GSFC Materials Branch

59. Batteries
To be installed on orbit

60. Hazard Reports JSC 1230 Standard Hazard Report Unique Hazard Reports
RF Transmission
Recontact