# BIRDS-2 1U CubeSat bus
*bus . products*

1U CubeSat bus used by the BIRDS-2 satellites released from the International Space Station.

## Specifications
- **product status**: retired
- **deployment context**: orbital
- **manufacturer**: kyushu-institute-of-technology
- **bus**: {"platform_class":"nano","cubesat_units":"1U"}
- **entity type**: bus
- **last verified date**: 2026-06-26
- **verified by**: operator
- **claim status**: unclaimed
- **provider**: kyushu-institute-of-technology
- **mass kg**: 1.11
- **form factor**: 1U CubeSat
- **attributes**: {"kind":"bus","product_status":"retired","deployment_context":"orbital","manufacturer":"kyushu-institute-of-technology","description":"1U CubeSat bus used by the BIRDS-2 satellites released from the International Space Station.","bus":"{\"platform_class\":\"nano\",\"cubesat_units\":\"1U\"}"}
- **relevance**: in-scope

## Editorial
BIRDS-2 1U CubeSat bus is the CubeSat platform used by the BHUTAN-1, Maya-1, and UiTMSAT-1 satellites [^birds2-bus][^birds2-smallsat-2018]. It was built within the Kyushu Institute of Technology-led BIRDS-2 capacity-building project with participating student teams from Bhutan, Malaysia, the Philippines, and Japan [^birds2-smallsat-2018]. The bus documentation states BIRDS-1 heritage and identifies an OBC subsystem with dual Renesas H8 36057 microcontrollers, a PIC 16F1787 microcontroller, two flash memories, two multiplexers, SPI interface, and a 437.375 MHz beacon frequency [^birds2-bus].

## Compositional position
- maya-1 (missions) --[mission_buses]--> BIRDS-2 1U CubeSat bus

## Sources
- [birds2-bus] | BIRDS-2 Satellite Bus | https://birds2.birds-project.com/satellite-bus/ | tier=operator-engineering | accessed=2026-06-26
- [birds2-smallsat-2018] | BIRDS-2: Multi-Nation Cubesat Constellation Project for Learning and Capacity Building | https://digitalcommons.usu.edu/smallsat/2018/all2018/435/ | tier=peer-reviewed | accessed=2026-06-26

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Source: https://eo-atlas.org/products/bus/birds-2-1u-cubesat-bus
Maintainer: SpectraWorks B.V. (CC-BY 4.0)