# Presentation: 202935

## JAXA DCS processing system The 38th ARGOS Operations Committee Meeting June 30, 2004    @Monterey,  CA USA 

- Hirohiko Dosho
- Earth Observation Center (EOC)
- Earth Observation Research and application Center (EORC)
- Office of Space Application
- Japan Aerospace Exploration Agency (JAXA)

- F-3-2

## 1. Current DCS processing system
 1.1 JAXA DCS processing system
 1.2 EOC DCS related configuration
 1.3 DCS equipments in EOC
 1.4 NOAA ARGOS receiving system in EOC
2. ADEOS-II DCS operation result
 2.1 Overview of ADEOS-II DCS operation
 2.2 ADEOS-II DCS major events
 2.3 Onboard DCS initial checkout evaluation result
 2.4 Onboard DCS Antenna pattern evaluation
 2.5 DCS Ground segment function check result
 2.6 ADEOS-II DCS Mission operation result
3. Conclusion

-  1.1 JAXA DCS processing system
-  1.2 EOC DCS related configuration
-  1.3 DCS equipments in EOC
-  1.4 NOAA ARGOS receiving system in EOC
- 2. ADEOS-II DCS operation result
-  2.1 Overview of ADEOS-II DCS operation
-  2.2 ADEOS-II DCS major events
-  2.3 Onboard DCS initial checkout evaluation result
-  2.4 Onboard DCS Antenna pattern evaluation
-  2.5 DCS Ground segment function check result
-  2.6 ADEOS-II DCS Mission operation result
- 3. Conclusion

_**Contents**_

## Current DCS processing system  

## 1.1 JAXA DCS processing system

-  JAXA has two systems for DCS data reception, processing and delivery, these are for ADEOS-II and for NOAA satellites.
-  Unfortunately, ADEOS-II was lost on October 24, 2003 UT, and JAXA officially announced to the public that the continuation of the mission is impossible, on 31.
-  Accordingly, the operation of the ADEOS-II DCS processing system was terminated and the function of delivering global DCS data from EOC Hatoyama to CLS was lost.
-  Because of budget restrictions, except for NOAA DCS data processing and delivery, all DCS related operation is suppressed currently.
-  The data reception and processing system for NOAA satellites regional data have been operating consistently in EOC.
-  EOC receives the HRPT data of NOAA 12, 14, 15, 16 and 17, and extracts DCS data, produce Level 0 data and transmit them to CLS Toulouse, altogether about 18 passes data per day.
-  EOC receives 2LE orbital data of NOAA satellites from CLS everyday.
-  DCS processing system for NOAA satellites operates autonomously.

## 1.2 EOC DCS related configuration

-      CLS(via CLS Japan)

- DDS

- DCSEquipments

- DCSprocess S/W

- RX/REC/L0 process

- Internet

- ADEOS-IIDCS L0,HK

- NOAA DCS L0

- ADEOS-II DCS L0, DCS processed

- Ephemeris, 2Line, Time

- DMR

- DMRR,DMRS

- DMR

- Kiruna, etc

- EOC Hatoyama

- ADEOS-IIDCS L0, HK(S)

- ADEOS-IIHK(S)

- DM,DMRR,DMRS

- Closed line (NOAA)InternetRS232C
- TerminatedOperating

- Closed line (ADEOS-II)

-  DCS Configuration in EOC Hatoyama

- MMO

- MOIFs

- NOAA DCS L0

- MOIFs

_**1.2 EOC DCS related configuration**_

- DCSprocessed

- DMMC

- Ephemeris, 2Line, Time

## 1.3 DCS equipments in EOC

-   Master  Beacon(terminated)

- Reference Beacon (PMT)

- Reference Beacon (PTT)

- NOAA ARGOS Receiving System

- DCS equipments in EOC Hatoyama

## 1.4 NOAA ARGOS receiving system in EOC 

_**1.4 NOAA ARGOS receiving system in EOC **_

- NOAA ARGOS Receiver/Processor
-  •Scheduling •TIP extraction •DCS extraction •DCS L0 producing

- Interface Processor

- DDS(Gateway)

- NOAA12,14,15,16,17

- Galileo/TIROS system  IPS, US

- 1.8mφProgram/Auto track

- CLS (viaCLS Japan)

- Antenna Cont.

- HRPT

- 2LE

- 2LE

- NOAA ARGOS receiving system

- DCS L0

- DCS L0

- NOAA ARGOS receiving system in EOC Hatoyama

## DCS Antennas in EOC

- Radome for NOAA ARGOS Antenna

- PMT Antenna

- MB Antenna

## NOAA ARGOS receiver and processor

## Interface processor

## 2. ADEOS-II DCS operation result

##  Under the MOU (1996) between JAXA (ex-NASDA) and CNES, “Argos-Next” DCS instrument was developed jointly and installed on the ADEOS-II satellite. The satellite was launched in December 2002, from Tanegashima successfully.
 1.5 months after the launch, onboard DCS was turned on, and initial checkout was started. In parallel, DCS ground segment was checked in JAXA and CNES/CLS, and the evaluation result for both onboard equipment and ground segment were good.
 From April 2, 2003, ADEOS-II DCS global data were continuously delivered to CLS, and from May, CLS started to use ADEOS-II DCS data operationally.
 In mid April 2003 JAXA completed the initial checkout review, and the Routine Operation Readiness Review in May 2003, with all related organizations gathered at Tsukuba they confirmed that all ADEOS-II onboard equipments keep their performance before the launch, and confirmed their readiness to shift to next operation phase. 
 Regarding to DCS, system tuning and preparation works of ground segments for starting “ARGOS-Next” service, were continued. And most of the preparation works for the general users were finished at the middle of October.
Regretfully ADEOS-II suddenly lost all the functions on October 24, 2003.
 Because of the loss of ADEOS-II, user service of ARGOS-Next was not started, but the effectiveness of  downlink messaging service was confirmed, and also, almost all the functions and performance of newly developed components necessary for downlink messaging service were confirmed. 

-  1.5 months after the launch, onboard DCS was turned on, and initial checkout was started. In parallel, DCS ground segment was checked in JAXA and CNES/CLS, and the evaluation result for both onboard equipment and ground segment were good.
-  From April 2, 2003, ADEOS-II DCS global data were continuously delivered to CLS, and from May, CLS started to use ADEOS-II DCS data operationally.
-  In mid April 2003 JAXA completed the initial checkout review, and the Routine Operation Readiness Review in May 2003, with all related organizations gathered at Tsukuba they confirmed that all ADEOS-II onboard equipments keep their performance before the launch, and confirmed their readiness to shift to next operation phase.
-  Regarding to DCS, system tuning and preparation works of ground segments for starting “ARGOS-Next” service, were continued. And most of the preparation works for the general users were finished at the middle of October.
- Regretfully ADEOS-II suddenly lost all the functions on October 24, 2003.
-  Because of the loss of ADEOS-II, user service of ARGOS-Next was not started, but the effectiveness of  downlink messaging service was confirmed, and also, almost all the functions and performance of newly developed components necessary for downlink messaging service were confirmed.

_**2.1 Over view of ADEOS-II DCS operation**_

## ADEOS-II Launch	; December 14, 2002 (jst)
DCS Ant. Deploy	; December 18, 2002
DCS operational mode setting ; January 29, 2003
Last DRU(#1) turned on ; February 13, 2003
DCS global data continuous delivery start		; April 2, 2003
Initial Checkout review ; April 14, 2003
ADEOS-II DCS in operation ; May, 2003 
RORR			; May 20, 2003
Loss of ADEOS-II 	; October 25, 2003

- DCS Ant. Deploy	; December 18, 2002
- DCS operational mode setting ; January 29, 2003
- Last DRU(#1) turned on ; February 13, 2003
- DCS global data continuous delivery start		; April 2, 2003
- Initial Checkout review ; April 14, 2003
- ADEOS-II DCS in operation ; May, 2003
- RORR			; May 20, 2003
- Loss of ADEOS-II 	; October 25, 2003

_**2.2 ADEOS-II DCS major events**_

## 2.3 On Board DCS initial checkout evaluation result 

**1. Antenna deployment:****	****OK**
**2. UHF Tx/Rx:****	****	****OK**
**   ****Analysis of On Board DCS Antenna pattern**
-       - 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.
**3. CNES components      OK**

##    DCS downlink level measured by JAXA’s PMT

-  2003/03/03 path31

_**2.4 On Board DCS Antenna pattern evaluation**_

-  2003/03/03 path35

## On Board DCS Antenna pattern evaluation

- Ant. Gain; Scale model

- Ant. Gain; Estimated

- Antenna Gain [dBi]

_**2.4 On Board DCS Antenna pattern evaluation**_

- Antenna Gain [dBi]

## 2.5 DCS Ground segment function check result 

| No. | Item | Evaluation Criteria | Result |
| --- | --- | --- | --- |
| 1 | Downlink Message Request (DMR) transmission from EOC to DMMR | To be accepted by CNES/CLS | OK |
| 2 | Downlink Message transmission from Master Beacon at EOC | Downlink Message should be transmitted properly to PMT at EOC | OK |
| 3 | Switching DCS operation Mode from Nominal Mode to Interactive Mode, and vice-versa | Operation mode should be switched
 | OK |
| 4 | Interactive Mode operation between Hatoyama Master Beacon and ADEOS-II | Confirm the Interactive Mode operation | OK |

- In Initial Checkout phase, basic ADEOS-II related connection between EOC Hatoyama, DMMC and the DCS onboard were confirmed. After the C/O phase, following functions were checked and had good results.

## 2.6  ADEOS-II DCS Mission operation result

- Onboard DCS was maintained properly and worked normally in the mission operation period.
- Mission planning and management were successfully done, in corporation with internal and external parties.
- Global data acquisition, using Data Relay Test Satellite (DRTS), was successfully done.
- 98 % of planned DCS global data were sent to CLS Toulouse.
-      95 % of regional data were transmitted to CLS in the agreed time requirement (10 min. from data reception completed)
-      94 % of global data were transmitted to CLS in the agreed time requirement (3 hrs from onboard data recording start)

## 2.6.1  DCS UHF transmit power during mission operation

- DCS UHF transmit power telemetry data during mission operation

- DCS UHF transmit power was quite stable. HK telemetry showed 37.5 – 37.6 dBm in mission operation period.

## 2.6.2  ADEOS-II Level 0 processing result

| Sensor | Plan | OK | NG | NO L0RL*1  | Data delivery% |
| --- | --- | --- | --- | --- | --- |
| GLI-1km | 4,084 | 4,016 | 67 | 1 | 98.3 |
| GLI-250m | 4,066 | 3,976 | 66 | 24 | 97.8 |
| AMSR | 4,084 | 4,017 | 65 | 2 | 98.4 |
| DCS(global) | 3,450 | 3,382 | 67 | 1 | 98.0 |
| SeaWinds | 3,450 | 3,387 | 63 | 0 | 98.2 |
| ILAS-II | 3,448 | 3,385 | 63 | 0 | 98.2 |

- ADEOS-II Level 0 processing result in mission operation (April 2 – October 24)

- *1; L0RL: Level0 processing result file, Information of L0 processing result at receiving station

## 2.6.3  Time line evaluation of Level 0 delivery

| L0 Data | To | Standard | Planned pass | OK | NG | % |
| --- | --- | --- | --- | --- | --- | --- |
| DCS
EOC Regional | CLS Japan | Within 10 min,
From data reception complete at EOC | 922 | 880 | 42 | 95.4 |
| DCS
Kiruna Regional |  | Within 15 min,
From data reception complete at Kiruna | 1194 | 1131 | 63 | 94.7 |
| DCS
Global |  | Within 180 min,
From data recording start | 3450 | 3235 | 215 | 93.8 |
| SeaWinds | JPL,
NOAA | Within 160 min,
From data recording start (more than 80 %) | 2386(EOC,Kiruna) | 2170 | 216 | 90.9 |
| ILAS-II | NIES | Within 4/5 hrs (DRTS/ DT), From data recording start | 2063/
1385 | 1926/
1259 | 137/
126 | 93.4/
90.9 |

_**2.6.3  Time line evaluation of Level 0 delivery**_

- Result of the agreement of the data delivery time requirement (April 2 – October 24)

## 3. Conclusions

- NOAA DCS data delivery from JAXA EOC to CLS is continuing.
- JAXA launched ADEOS-II in December 2002 and lost it in October 2003, on which “ARGOS-Next” DCS instrument was on board.
-  ADEOS-II DCS global data delivery from EOC Hatoyama to CLS became impossible.
- While ADEOS-II was alive, almost all the functions for ARGOS-Next system were confirmed in both onboard DCS and ground segments at JAXA EOC and CNES/CLS, and also, the effectiveness of Downlink Messaging service was confirmed.
- Preparation works for ARGOS-Next user service was almost completed, but just before the completion, ADEOS-II failed.
- The loss of ADEOS-II is quite regretful, but JAXA thinks the experience and result acquired from ADEOS-II program made contribution to the evolution of ARGOS system.