1. 超伝導サブミリ波サウンダ (SMILES)の開発
稲谷順司
SMILESミッションチーム
June 14, 2001
JEM-SMILES

2. FY2000の研究・開発 システム設計 コンポーネント設計 地上システム設計 ミッション解析 構造設計，構造モデル製作，音響試験 熱設計
EMC設計，電磁シールド試験
コンポーネント設計
コンポーネントPDRの実施
地上システム設計
ミッション解析
“JEM/SMILES Mission Plan”発行
June 14, 2001
JEM-SMILES

3. June 14, 2001
JEM-SMILES

4. Instruments
SMILES:
Superconducting Submillimeter-wave Limb-emission Sounder
View in the Cryostat
June 14, 2001
JEM-SMILES

5. Signal Flow
June 14, 2001
JEM-SMILES

6. 構造モデル
June 14, 2001
JEM-SMILES

7. SMILES構体の電磁シールド
June 14, 2001
JEM-SMILES

8. サブミリ波アンテナ鏡面 Size: 400 mm x 200 mm Material: Aluminum Surface Error:
< mm (rms)
Beam efficiency change is less than 1% for temperatures -4C to +49C.
Temperature range expected in orbit: -31.5C to +16.5C
Heaters shall be used to keep the accuracy.
June 14, 2001
JEM-SMILES

9. Antenna Response Pattern
Effective Pattern:
Integrated over AZ angles
Averaged for six consecutive EL points involved in a unit data
June 14, 2001
JEM-SMILES

10. June 14, 2001
JEM-SMILES

11. Receiver Noise-Temperature
SIS Mixer + HEMT Amp.
@ 300K
HEMT Amplifier
Devices: FHX76LP
Gain:
23-26
HEMT Amp
@ 20K
June 14, 2001
JEM-SMILES

12. 4 K Mechanical Cooler Cooling to 100 K & 20 K:
Cooling Capacity:
20 mW @ 4.5 K K K
Power Consumption:
300 W @ 120 VDC
Mass:
Cooler 40 kg
Cryostat 26 kg
Electronics 24 kg
Total 90 kg
Cooling to 100 K & 20 K:
Two-stage Stirling Cooler
Cooling to 4.5 K:
Joule-Thomson Cooler
June 14, 2001
JEM-SMILES

13. Cryostat by SHI Radiation Shield: MLI (40 layers)
Signal Input Window: IR Filters (‘Zitex’)
Support for 100 K Stage: S2-GFRP Straps (12 pieces)
Support for 20 K Stage: GFRP Pipes (4 pieces)
Support for 4 K Stage: CFRP Pipes (4 pieces)
by SHI
June 14, 2001
JEM-SMILES

14. Sub-mm Receiver Subsystem
To Antenna
Ambient Temperature Optics
AOPT
Cryostat
To Cold-Sky
Terminator
AAMP
Single Sideband
Filter
CREC
Sub-mm
LO Source
He Compressor (JT)
He Compressor (ST)
June 14, 2001
JEM-SMILES

15. Single Sideband Filter
June 14, 2001
JEM-SMILES

16. システム雑音温度
June 14, 2001
JEM-SMILES

17. Acousto-Optical Spectrometer
Bandwidth:
1200 MHz x 2 units
GHz /unit
Frequency Resolution:
1.8 MHz (FWHM)
0.8 MHz /ch
Output Data:
16 bits x 1728 ch /unit
in 500 msec
AOS (Astrium & OPM)
June 14, 2001
JEM-SMILES

18. Global Coverage Trajectory for 24 Hours The Arctic Region
Covered Latitudes:
68N – 35S (ISS Yaw: +15 deg)
65N – 38S (ISS Yaw: 0 deg)
61N – 42S (ISS Yaw: -15 deg)
Horizontal Sampling Interval:
about 360 km in orbital direction
June 14, 2001
JEM-SMILES

19. Height Resolution (Antenna)
Angular Width
(or Interval)
[deg]
Linear Width (or Interval)
at Tangent Point Heights: 10 – 60 km
[km]
ISS: 350 km
ISS: 400 km
ISS: 460 km
HPBW
0.096
3.82
– 3.24
4.08
– 3.51
4.41
– 3.82
Sampling Interval
2.25
– 1.92
2.42
– 2.10
2.60
– 2.26
A refraction effect is included, which is significant for TPH < 20 km.
June 14, 2001
JEM-SMILES

20. Errors in Tangent Point Height (1-s level)
Causes of Errors
Bias [km]
Random [km]
Errors in Attitude:
Sub-mm beam offset errors
5.02 -
Mechanical driving errors
0.27
Thermal bending errors
0.12
Mechanical alignment errors
STT measurement errors
0.06
Time synchronization errors
0.50
0.18
Errors in Altitude:
ISS positional errors
0.30
0.10
Overall Error with the beam offset
5.07
0.34
Overall Error w/o the beam offset
0.76
June 14, 2001
JEM-SMILES

21. Expected Spectra: Band-A
Limb Scanning A
June 14, 2001
JEM-SMILES

22. Expected Spectra: Band-B
June 14, 2001
JEM-SMILES

23. Expected Spectra: Band-C
Limb Scanning C
June 14, 2001
JEM-SMILES

24. 分子の存在量（VMR)
Model atmosphere at 45N
June 14, 2001
JEM-SMILES

25. (Latitude resolution of 5 deg, averaged over longitudes)
分子に対する検出分解能
Daily Averaged Data
(Latitude resolution of 5 deg, averaged over longitudes)
Single Scan Data
(in every 53 sec)
June 14, 2001
JEM-SMILES