KSAT2 Project Top Page (in English)

KSAT2 Project

Japanese/English

This page describes a next project succeeded to the Hayato (KSAT) project.

Missions of KSAT2

1. Study on Forcast of Localied Downpour and Tornado
   In-orbit experiments of an original observation mathod of atmospheric water vapor.
2. Take Earth Live Images from Space
   Ku-band high-speed data transmission, one shot / a few seconds.
3. Basic Experiments for LEO Positioning Satellites
   Frequency and phase synchronization between a ground-base system and a satellite.
4. Orbit Determination Experiments with Radio Interferometer
   Essential item for nano-satellite orbiting at very low earth orbit.
5. Satellite Traking Experiment at Very Low Earth Orbit
   Evaluation of Earth's atmosphere to the satellite.
6. Verification of Pantograph-type Extending Boom in Space
   The boom was originally designed and is fit for compact satellites.
7. Messages of Encourgement from Space to Japan
   Hand-lettered messages and heart warm pictures, especially from children eesponsible for the future.

Imaginary Drawing of Satellte in Space (Expand by Click)

KSAT2 orbiting at the altitude of ISS (left panel), and before and after deployment from POD (right panel / original design version).

Outloook of KSAT2 (Expand by Click)

Outlook of KSAT2 before (left panel) and after (right panel) deployment from POD (revised verion).

Main body of the satellite has a shape of 10 cm Cube, and its mass will be 1.5 kg.
An expanding boom for attitude control and two solar paddles are attached to the main body.

System Block Diagram (Expand by Click)

  To be low power dissipation and compact comparing with KSAT.
  Redandancy with dual communication lines.
  Improvement of Power Efficiency with MPPT control.

Communication

Dual uplink lines, Dual downlink lines and a beacon signal line.

- Frequency and Transmissio Rate -

Frequency Band Moduration Method Transmission Rate Purpose

Uplink UHF Band F2D 1 kbps Commands

S Band G2D 1 kbps Command (Backup)

Downlink S Band G1D 200 ksps HK Data

Ku Band G1D 1 Mbps or Carrier Image and Beacon

**- Frequency and Transmissio Rate -**
	Frequency Band	Moduration Method	Transmission Rate	Purpose
Uplink	UHF Band	F2D	1 kbps	Commands
S Band	G2D	1 kbps	Command (Backup)
Downlink	S Band	G1D	200 ksps	HK Data
Ku Band	G1D	1 Mbps or Carrier	Image and Beacon

# Coding by viterbi algorithm is applied to S-band downlin data.

Schedule

Masanori Nishio Jan. 28, 2012 Revised