# PHL-50 50 kg microsatellite bus
*bus . products*

## Specifications
- **product status**: demonstration
- **deployment context**: orbital
- **manufacturer**: dost-asti
- **bus**: {"platform_class":"micro"}
- **entity type**: bus
- **last verified date**: 2026-06-26
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: dost-asti
- **attributes**: {"kind":"bus","product_status":"demonstration","deployment_context":"orbital","manufacturer":"dost-asti","bus":"{\"platform_class\":\"micro\"}"}
- **relevance**: in-scope

## Editorial
PHL-50 50 kg microsatellite bus is a micro-class platform basis tied to the Diwata-1 spacecraft. DIWATA-1 is a 50 kg-class microsatellite jointly developed by DOST, UP Diliman, Tohoku University, and Hokkaido University.[^jaxa-diwata1-deployment] The 50 kg mass class places the platform in the micro bus class.[^jaxa-diwata1-deployment] Payload capacity and detailed subsystem figures remain unspecified.

## Sources
- [jaxa-diwata1-deployment] | Successful Deployment of DIWATA-1 from ISS Kibo, JAXA | https://global.jaxa.jp/press/2016/04/20160427_diwata1.html | tier=agency-doc | accessed=2026-06-26 | author=JAXA
- [arxiv-phl50-lessons] | Lessons Learned from Structural Design and Vibration Testing of 50-kg Microsatellites Deployed from the ISS | https://arxiv.org/abs/2601.12840 | tier=community | accessed=2026-06-26 | author=Sakamoto et al.
  Technical preprint used only as context, not as peer-reviewed authority.

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Source: https://eo-atlas.org/products/bus/phl-50-microsatellite-bus
Maintainer: SpectraWorks B.V. (CC-BY 4.0)