1. HA1L High Altitude 1U Laboratory
University of Michigan
Tom Heine
Ted Lorts
Hrishikesh Shelar

2. Mission Overview:
HA1L’s mission is to serve as a test of Michigan’s next core CubeSat bus technology.
The central avionics of CADRE are included on HA1L. We will demonstrate the following capabilities:
Software modes
Sensor and health checkouts
Solar cells charging batteries
UHF commanding and file transfer
Beaconing and GPS tracking
Watchdog-triggered reset
Post-processed attitude determination

3. Requirements Applicable Documents DOC-01
University NanoSat Program SHOT II User's Guide Rev 5
Mission Statement
Traceability
Section
MS-00
Fly a CADRE-based University of Michigan balloon payload (HA1L) PM
Mission Requirements
MR-02
Table 1: SHOT II Payload Deviations from CADRE (next slide)
MR-01
MR-03
HA1L shall demonstrate successful entrance and exit from CADRE "SAFE" mode triggered by the CDH watchdog timer.
MR-04
HA1L shall perform beaconing of attitude sensors, health and status
MR-05
HA1L shall demonstrate successful downlink of simulated WINCS science data
MR-06
HA1L shall be commandable by the ground operators during flight
MR-07
HA1L shall execute commands to achieve the following operations modes: SAFE, STANDBY, and NOMINAL OPERATIONS
System Requirements
SYS-01
HA1L mass shall not exceed 1.5 kg
6.1.2
SYS-02
HA1L passthough hole inner diameter shall be between 4.0 and 6.4 mm
6.2.1
SYS-03
HA1L passthough tube shall not be metal
SYS-04
HA1L separation distance to other payloads shall be less than 3 m
SYS-05
HA1L shall have an American flag decal and contact information visible on the exterior
3.5
SYS-06
HA1L center of mass shall be kept towards the center
DOC-01, MR-01
6.1.3
SYS-07
HA1L shall not broadcast on the following frequencies: MHz (±15 kHz), MHz (±15 kHz) and MHz (±100 kHz)
6.2.3
SYS-08
HA1L transmitter shall be controller by a liscenced HAM operator
SYS-09
HA1L Effective Isotropic Radiated Power (EIRP) shall be less than .4 W (26 dBm)
SYS-10
HA1L transmitter shall be capable of a commandable deactivation
SYS-11
HA1L shall be capable of surviving a shock loading of 15 g's
6.3.2
SYS-12
HA1L shall only use University of Michigan support equipment
6.3.3
SYS-13
HA1L shall maintain an operational temperature range between -0°C and 60°C.
3.4
SYS-14
HA1L power shall be provided through batteries
6.5.1
SYS-15
HA1L shall have external electrical switching to ensure system power is off until launch.
SYS-16
HA1L shall ground external conducting faces to negative battery terminal
6.5.3
SYS-17
HA1L shall pass a "Whip" test
8.1.1
SYS-18
HA1L shall pass a "Drop" test
8.1.2
SYS-19
HA1L shall pass a "Stair Pitch" test
8.1.3
SYS-20
HA1L shall pass a "Cooler" test
8.2.1
SYS-21
HA1L shall pass a full functional test
8.3

4. CADRE HA1L HA1L/CADRE Connection: STR CDH COM ADCS EPS
3U structure designed in-house
Deployable panels and antennas
- 1U version of CADRE structure
(room added for pass-through tube)
Foam box for protection, thermal insulation, and
mounting peripheral modules
STR
CDH
FCPU board commands
over standardized harnesses
FCPU board commands
over standardized harnesses
UHF beacon/commanding
S-band for data downlink
UHF beacon/commanding
Beacon will contain realtime telemetry
COM
Live control: 2˚ of ram (3 reaction wheels)
Post-processed determination: 0.2˚ of ram
2 fine digital sun sensors, 1 star tracker, IMU,
magnetometers, dual frequency GPS
Post-processed determination: 5˚
4 course sun sensors, GPS, 4 magnetometers,
3-axis gyroscope
ADCS
8 strings of 4 cells, 4 strings of 7 cells
Boost-buck regulated 3.3 V, 5 V, and 7.2 V lines
4 3,100 mAhr Li-ion batteries
2 strings of 2 cells
Boost-buck regulated 3.3 V, 5 V, and 7.2 V lines
2 3,100 mAhr Li-ion batteries
EPS

5. HA1L Design:

6. HA1L Design:
HA1L’s avionics consist of CADRE’s first revision circuit boards which will be the majority of the satellite’s 3rd U.
The boards are attached together by hex standoffs, which allow the board stack to be removed entirely from the structure.

7. HA1L Design: HA1L has 5 flight boards CDH FCPU (Stamp 9G20) UHF radio
Watchdog timer (MSP430)
ADCS
Peripheral sensor modules, GPS
Battery Board
Bus power line regulators
Li-Ion batteries
Solar Board
Buck-boost regulator
-Z Interface Board
Connections to solar cells

8. HA1L Design:

9. SHOT II Test Details:
- Discuss your test program for you SHOT II design
- Prove your project is ready for flight
- Show test data (graphs, charts, etc) that are labeled, with key events indicated
- Structural tests should be included but equal time should be devoted to mission/science tests (present mission/science test first)
- Proof should be shown that you have actually recorded, off-loaded, and analyzed your data

10. SHOT II Test Details:
Subsystem functionality was tested throughout board population
Board-to-board tests were concurrent with assembly
Full integrated system test included Conops and individual subsystem performance checks
Test Assembly Document and System Level Test Procedures document capture assembly and test procedures
29 integrated system tests to verify requirements
Basic Test Summary
Mass ✓
Drop/Whip/Pitch Tests
Pass
Broadcast on forbidden bands? No
Radio EIRP
0.3 W
Operable min temperature
Tube clearance
Commandable radio shutdown?
Yes

11. HA1L Integration and Test Highlights
HA1L Integration Bench
HA1L Whip Test

12. HA1L RF Spectrum Results:
HA1L 437MHz Spectrum
437MHz Spectrum (MU S&T, StL U)
0-50kHz (MIT)
*additional spectra in backup slides

13. Back Up

14. Additional Frequencies