Status of ADEOSII Spacecraft

1

• Status of ADEOS-II Spacecraft
• The 37th ARGOS Operations Committee MeetingJune
  11-13, 2003 _at_Les Saintes-Marie-de-la-Mer,
  France
• Yasushi Kojima
• ADEOS-II Project team
• NASDA

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Contents
1. ADEOS-II satellite overview -
ADEOS-II - DCS (Data Collection
system) 2. Evaluation result of checkout phase
- Launch - Checkout phase 3.
Conclusion
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1. ADEOS-II overview
Mission Objectives
The Advanced Earth Observing Satellite-II(ADEOS-I
I), the successor of the Advanced Earth Observing
Satellite (ADEOS), was developed to acquire data
for global climate change research,as well as for
applications such as meteorology and fishery
activities.
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1. ADEOS-II overview
Main Characteristics of ADEOS-?
ExteriorConfiguration Module with a single
solar array paddle Dimension Main
Body Approx. 6m4m4m (X-axisY-axisZ-axis)
Solar Array Paddle Approx. 3m24m Total Mass
3.68t Mission Instrument Mass 1.23t Power
Generation 5,350W (End of Life) Designed life
3years (Propellant 5years) Orbit
Sun-synchronous sub-recurrent orbit Altitude
802.92km Orbit Inclination 98.62? Period
101 minutes Recurrent Period 4
days Local Sun Time AM 1030 Launch
SiteTanegashima Space Center Launch
Vehicle H-IIA Rocket
ADEOS-II Orbital Configuration
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1. ADEOS-II overview
ADEOS-II
AMSR-SENS Advanced Microwave Scanning
Radiometer-Sensor
IOCS Inter Orbital Communication Subsystem
AMSR-CONT Advanced Microwave Scanning Radiometer
-Controller
Y
X
AOCS Attitude and Orbit Control Subsystem
VMS Visual Monitoring System
MDP Mission Data Processing Subsystem
Z
DTL Direct Transmission For Local Users
PDL Paddle Assembly
DCS Data Collection System
DT Direct Transmission
Improved Limb Atomospheric Spectrometer-?
ILAS-?
GLI Global Imager
ESA Earth Sensor Assembly
CDH Communication Data
Handling Subsystem
Seawinds-SAS Seawinds (Antenna)
POLDER Polarization and
Directionality of the Earths Reflectance
Direction of Earth
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1. ADEOS-II overview
DCS (Data Collection System)
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2. Evaluation result of check out phase
Launch

• ADEOS-II was launched at 103100 on 14 December,
  2002 from Tanegashima Space Center by H-IIA4.
• 16min 32sec after launch, ADEOS-II was injected
  to expected orbit very precisely.

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2. Evaluation result of check out phase
Check out phase
Checkout Schedule
2003
2002
Apr
Mar
Dec
Jan
Feb
Milestone
?

4/14
12/14 launch
Checkout Completion Review
Initial Critical Phase (to 12/17)
(to 1/10)
Critical Phase
Checkout Phase
Cal/Val Phase
12/15
4/9
Bus
3/10
IOCS(ARTEMIS)

3/27
3/29
2/27


2/21
2/17
3/29
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IOCS(DRTS)
Instruments
1/21
2/23
ETO
2/26
1/20
System Total
3/22
3/19
4/9
4/2
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2. Evaluation result of check out phase
Check out phase
Initial Critical Phase

• 14 December
• Rev.0 Three axis control, PDL boom deployment
• Rev.1 PDL mast deployment, PDL Sun tracking
• Instruments power on
• Rev.7 SeaWinds V-band release
• 15 December
• Rev.8 IOCS antenna deployment 1
• 16 December
• X band checkout
• 17 December
• IOCS antenna deployment 2
• Transition to Normal attitude control using gyros

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2. Evaluation result of check out phase
Check out phase
4 February, 2003 DRU6 ON 9 February, 2003
DRU5 ON 13 February, 2003 DRU4
DRU1 ON

• 18 December, 2002
• DCS antenna deployment
• 20 December, 2002 - 10 January, 2003
• AMSR antenna spin up
• Initial Orbit Control
• GLI detector cool down
• 29 January, 2003
• DCS operational mode start
• DRU8 ON
• TX ON
• 1 February, 2003
• DRU7 ON

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2. Evaluation result of check out phase
Check out phase
Checkout Result

• Bus systems
• - Communication and Data Handling Subsystem
  (CDH)
• - Mission Data Processing Subsystem (MDP)
• - Inter Orbit Communication Subsystem (IOCS)
• - Direct Transmission Subsystem (DT)
• - Direct Transmission to Local users subsystem
  (DTL)
• - Electric Power Subsystem (EPS)
• - Reaction Control Subsystem (RCS)
• - Solar Array Paddle Subsystem (PDL)
• - Attitude and Orbit Control Subsystem (AOCS)
• - Optical Disk Recorder (ODR)
• - Visible Monitoring Subsystem (VMS)
• - Dynamic Monitoring Subsystem (DMS)
• - Thermal Control Subsystem (TCS)

OK
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2. Evaluation result of check out phase
Check out phase
Checkout Result

• Sensors (1/2)
• Data Collection System (DCS)
• Antenna deployment OK
• UHF Tx/Rx OK
• lt Analysis of On Board DCS Antenna pattern gt
• - Onboard DCS antenna pattern was
  analyzed.
• - NASDA reference DCP (PMT) measured
  22 passes of DCS UHF
• down link level in Broadcasting
  mode, with a support of CNES/CLS.
• - Estimated pattern was calculated
  from PMT measured reception
• level and onboard DCS
  transmitting power in HK data. Estimated
• pattern was compared with
  ADEOS-II DCS scale model antenna
• pattern. Both patterns fit
  fairly well.
• - DCS antenna pattern is OK.
• CNES components OK

OK
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2. Evaluation result of check out phase
Check out phase
Checkout Result
Sensors (2/2) - GLI (GLobal Imager) - AMSR
(Advanced Microwave Scanning Radiometer) -
ILAS-II (Improved Limb Atmospheric
Spectrometer-II) - SeaWinds (SeaWinds
Scatterometer) - POLDER (Polarization and
Directionality of the Earths surface)
OK
AMSR images Sea surface temperature
GLI First Image on Jan 25, 2003
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2. Evaluation result of check out phase
Check out phase
Checkout Completion Review

• Minor anomalies were occurred in checkout phase.
  But these were not significant for ADEOS-II
  operation in Calibration/Validation Phase.
• Checkout Completion Review was hold on 14 April.
• NASDA internal review board approved completion
  of
• Checkout Phase and transition to
• Calibration/Validation Phase.

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3. Conclusion

• Result of ADEOS-II and DCS check out
• - There were no significant problems.
• - Telemetry trends are as expected.
• - Performance and function is good.
• ADEOS-II and DCS has been working well in
• Routine Operations since 14 April.