UniSat-1 Requirements Traceability Matrix
This document tracks all mission, system, and subsystem requirements for the UniSat-1 CubeSat platform.
Each requirement is linked to its parent, verification method, test ID, and current status.
Verification Methods
| Code |
Method |
| A |
Analysis |
| D |
Demonstration |
| I |
Inspection |
| T |
Test |
Status Legend
| Status |
Meaning |
| VERIFIED |
Requirement verified through designated method |
| IN PROGRESS |
Verification underway |
| PLANNED |
Verification not yet started |
| N/A |
Not applicable for current mission phase |
Mission-Level Requirements (REQ-MIS)
| ID |
Description |
Parent |
Verification |
Test ID |
Status |
| REQ-MIS-001 |
The satellite shall operate in a Sun-Synchronous Orbit at 550 km altitude with 97.6 deg inclination |
- |
A |
TST-ORB-001 |
VERIFIED |
| REQ-MIS-002 |
The mission shall have a minimum operational lifetime of 2 years |
- |
A |
TST-LIF-001 |
IN PROGRESS |
| REQ-MIS-003 |
The satellite shall capture multispectral Earth imagery (R, G, B, NIR bands) with GSD <= 30 m |
- |
T |
TST-IMG-001 |
PLANNED |
| REQ-MIS-004 |
The ground station shall maintain communication with the satellite during each visible pass |
- |
D |
TST-COM-001 |
IN PROGRESS |
| REQ-MIS-005 |
The satellite shall comply with the CubeSat Design Specification (CDS) for 3U form factor |
- |
I |
TST-CDS-001 |
VERIFIED |
System-Level Requirements (REQ-SYS)
| ID |
Description |
Parent |
Verification |
Test ID |
Status |
| REQ-SYS-001 |
Total satellite mass shall not exceed 4.0 kg (3U limit) including 20% margin |
REQ-MIS-005 |
I |
TST-MAS-001 |
VERIFIED |
| REQ-SYS-002 |
The EPS shall provide positive average power balance across each orbit |
REQ-MIS-002 |
A |
TST-PWR-001 |
VERIFIED |
| REQ-SYS-003 |
The communication subsystem shall support UHF uplink/downlink at 437 MHz with 9600 bps data rate |
REQ-MIS-004 |
T |
TST-UHF-001 |
IN PROGRESS |
| REQ-SYS-004 |
The ADCS shall achieve nadir pointing accuracy of <= 1.0 deg (3-sigma) |
REQ-MIS-003 |
T |
TST-ADC-001 |
PLANNED |
| REQ-SYS-005 |
The OBC shall process and store at least 32 GB of payload data |
REQ-MIS-003 |
T |
TST-OBC-001 |
PLANNED |
| REQ-SYS-006 |
Total component volume shall not exceed the 3U envelope (100 x 100 x 340.5 mm) |
REQ-MIS-005 |
I |
TST-VOL-001 |
VERIFIED |
| REQ-SYS-007 |
The satellite shall survive thermal extremes of -40 C to +85 C (component rated range) |
REQ-MIS-002 |
A, T |
TST-THR-001 |
IN PROGRESS |
| REQ-SYS-008 |
The battery subsystem shall provide at least 30 Wh capacity using Li-ion 18650 cells |
REQ-SYS-002 |
T |
TST-BAT-001 |
VERIFIED |
| REQ-SYS-009 |
The satellite shall support S-band downlink at 2.4 GHz with >= 256 kbps for payload data transfer |
REQ-MIS-003 |
T |
TST-SBD-001 |
PLANNED |
| REQ-SYS-010 |
The GNSS receiver shall provide orbital position with <= 10 m accuracy |
REQ-MIS-001 |
T |
TST-GPS-001 |
PLANNED |
Subsystem-Level Requirements (REQ-SUB)
| ID |
Description |
Parent |
Verification |
Test ID |
Status |
| REQ-SUB-001 |
Solar panels (GaAs triple-junction, 29.5% efficiency) shall generate >= 4.3 W average power with 6 deployed faces |
REQ-SYS-002 |
A, T |
TST-SOL-001 |
VERIFIED |
| REQ-SUB-002 |
The magnetorquer system (3-axis) shall provide >= 0.2 Am^2 magnetic dipole for detumbling |
REQ-SYS-004 |
T |
TST-MTQ-001 |
PLANNED |
| REQ-SUB-003 |
The camera module shall capture images at 8 MP resolution with on-board SVD compression |
REQ-SYS-005 |
T |
TST-CAM-001 |
PLANNED |
| REQ-SUB-004 |
The ground station Yagi antenna (14 dBi gain) shall close the UHF link with >= 10 dB margin at 550 km altitude |
REQ-SYS-003 |
A |
TST-LNK-001 |
VERIFIED |
| REQ-SUB-005 |
The radiation monitor (SBM-20 sensor) shall measure dose rate in the range 0.01 - 100 mR/hr |
REQ-MIS-003 |
T |
TST-RAD-001 |
PLANNED |
Traceability Summary
Coverage by Subsystem
| Subsystem |
Requirements |
Verified |
In Progress |
Planned |
| Orbit / Mission |
2 |
1 |
1 |
0 |
| Payload / Imaging |
3 |
0 |
0 |
3 |
| Communication |
3 |
1 |
1 |
1 |
| ADCS |
2 |
0 |
0 |
2 |
| Power / EPS |
3 |
3 |
0 |
0 |
| Structure / Mass |
2 |
2 |
0 |
0 |
| Thermal |
1 |
0 |
1 |
0 |
| OBC / Data |
1 |
0 |
0 |
1 |
| GNSS |
1 |
0 |
0 |
1 |
| Radiation |
1 |
0 |
0 |
1 |
| Ground Station |
1 |
1 |
0 |
0 |
| Total |
20 |
8 |
3 |
9 |
Verification Method Distribution
| Method |
Count |
| Analysis (A) |
5 |
| Test (T) |
13 |
| Inspection (I) |
3 |
| Demonstration (D) |
1 |
Note: Some requirements use multiple verification methods (e.g., REQ-SYS-007 uses both Analysis and Test).
Test Reference Index
| Test ID |
Description |
Requirement |
| TST-ORB-001 |
Orbit propagation analysis (J2 perturbation model) |
REQ-MIS-001 |
| TST-LIF-001 |
Atmospheric drag lifetime estimation |
REQ-MIS-002 |
| TST-IMG-001 |
Camera resolution and GSD verification on ground |
REQ-MIS-003 |
| TST-COM-001 |
End-to-end communication demonstration with ground station |
REQ-MIS-004 |
| TST-CDS-001 |
Physical inspection against CubeSat Design Specification |
REQ-MIS-005 |
| TST-MAS-001 |
Mass measurement of integrated satellite |
REQ-SYS-001 |
| TST-PWR-001 |
Power budget analysis and simulation across orbits |
REQ-SYS-002 |
| TST-UHF-001 |
UHF transceiver data rate and BER test |
REQ-SYS-003 |
| TST-ADC-001 |
ADCS pointing accuracy test on air-bearing table |
REQ-SYS-004 |
| TST-OBC-001 |
OBC data storage and processing throughput test |
REQ-SYS-005 |
| TST-VOL-001 |
Fit-check in 3U deployer mockup |
REQ-SYS-006 |
| TST-THR-001 |
Thermal vacuum chamber cycling test |
REQ-SYS-007 |
| TST-BAT-001 |
Battery capacity and cycle life test |
REQ-SYS-008 |
| TST-SBD-001 |
S-band transmitter data rate and power test |
REQ-SYS-009 |
| TST-GPS-001 |
GNSS position accuracy validation in orbit simulator |
REQ-SYS-010 |
| TST-SOL-001 |
Solar panel IV curve measurement under AM0 spectrum |
REQ-SUB-001 |
| TST-MTQ-001 |
Magnetorquer dipole moment measurement |
REQ-SUB-002 |
| TST-CAM-001 |
Camera module image capture and compression test |
REQ-SUB-003 |
| TST-LNK-001 |
Link budget analysis for UHF at max slant range |
REQ-SUB-004 |
| TST-RAD-001 |
Radiation sensor calibration with known source |
REQ-SUB-005 |
| *Document version: 1.0 |
Last updated: 2026-04-15* |