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IGARSS2011_presentation.ppt
1. VERIFICATION OF POINTING AND ANTENNA PATTERN KNOWLEDGE OF SUPERCONDUCTING SUBMILLIMETER-WAVE Limb-EMISSION SOUNDER (SMILES) Makoto Suzuki 1 , Satoshi Ochiai 2 , Chihiro Mitsuda 3 , Koji Imai 4 , Takeshi Manabe 5 , Kenichi Kikuchi 1 , Toshiyuki Nishibori 1 , Naohiro Manago 1 , Yoshitaka Iwata 1 , Takuki Sano 1 and Masato Shiotani 6 1 Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Japan 2 National Institute of Information and Communications Technology, Japan 3 Fujitsu FIP Corporation, Japan, 4 Tome R&D Inc., Japan 5 Department of Aerospace Engineering, Graduate School, Osaka Prefecture University, Japan 6 Research Institute for Sustainable Humanosphere, Kyoto University, Japan 11/07/28 IGARSS2011 Suzuki
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4. Two Bands among Band A, B, C can be observed. May 11, 2011 ACE meeting, M. Suzuki et al Band A Band B Band C Frequency region has been selected by engineering interest, as high as possible, but 625-626 GHz region is the only frequency to measure HCl below 1 THz. At 600 GHz troposphere is opaque in limb. Tsys ~ 350 K, and Noise floor is ~0.4 K, given by
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6. version 1.3 SMILES L2 data It is already comparable to other satellite data, Aura/MLS, SciSAt-1/ACE-FTS, ENVISAT/MIAPS, TIMED/SABER etc. 11/07/28 IGARSS2011 Suzuki
7. ver. 1.3 O 3 55 deg < latitude < 65 deg Ref – SMILES (Ref – SMILES) / |SMILES| The SMILES L2 O 3 has a negative bias with respect to ACE-FTS and MLS at around 50 km. However O 3 measurements are well determined within 5% differences at 20-40 km. O
8. ver. 1.3 HCl The SMILES L2 HCl has a negative bias with respect to ACE-FTS and MLS at around 50 km. However it is almost similar to those of the comparison instruments below 45 km. 55 deg < latitude < 65 deg Ref – SMILES (Ref – SMILES) / |SMILES|
9. M LS vs. SMILES: ClO (daytime) -35 deg < latitude < -25 deg Coincidence events: SMILES (59) for MLS v2.2 (92) SMILES (59) for MLS v3.3 (92) | t | < 24 hour, | r | < 200 km, | sza | < 2 deg Ref – SMILES (Ref – SMILES) / |SMILES| The SMILES L2 ClO is in good agreement with MLS v2.2 and v3.3. O Cl
10. SMILES is expected to provide break-through data, not the yet another satellite data. such as "Global ClO distribution" SMILES provides global ClO distribution with high precision. Furthermore, measurements of ClO, HCl, HOCl, and HO 2 can provide important insights into the Cly chemistry. ? Santee et al., 2008 ? MLS 25 ppt @22km this work 25 ppt at EQ 22km May 11, 2011 ACE meeting, M. Suzuki et al
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12. Left: AOS characteristics Right: Nonlinearity correction 11/07/28 IGARSS2011 Suzuki Fig2: A spectral image of comb signal Fig4 : Temporal variation of resolution (AU1)
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14. It was found that there might be jitter among attitude data. ISS attitude data should be corrected, using MAXI-ISS jitter data. 11/07/28 IGARSS2011 Suzuki Fig. 1 Relative difference between MAXI GPS 1pps signal and the ISS clock telemetry data.
15. ISS attitude gives much smooth retrieved profile. After the jitter correction, systematic bias also disappeared. 11/07/28 IGARSS2011 Suzuki Fig. 2 Retrieved O 3 profiles using the SMILES Star Sensor data (left) and ISS attitude data (right).
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17. Offset Cassegrain, 400 mm (vertical) x 200 mm (horizontal) elliptical shaped antenna Scan step 0.009375 deg (33.75’’), resolver +/- 0.0015 deg (5.4’’) 11/07/28 IGARSS2011 Suzuki
18. Fig. 3 Two dimensional (Elevation, Azimuth) SMILES antenna pattern. [7] T. Manabe, et al., “Measurements of the Offset-Cassegrain Antenna of JEM/SMILES Using a Near-Field Phase-Retrieval Method in the 640 GHz Band”, 21 st International Symposium Space Terahertz Technology, Oxford UK, March 23-25, 2010. 11/07/28 IGARSS2011 Suzuki
19. Fig. 4 One dimensional antenna pattern in elevation axis without antenna motion (dark), and with antenna motion (light). 11/07/28 IGARSS2011 Suzuki
20. Fig. 5 Averaged retrieved profiles (red: moving antenna, blue: fixed antenna), relative difference normalized to a priori of L2 ver. 1.3 O 3 (upper left), temperature (upper right), HCl (lower left) and BrO from SMILES Band A (lower right). 261 observations are averaged in Oct. 12, 2009 at equatorial region N10-S10. 11/07/28 IGARSS2011 Suzuki Band A O 3
21. Fig. 5 Averaged retrieved profiles (red: moving antenna, blue: fixed antenna), relative difference normalized to a priori of L2 ver. 1.3 O 3 (upper left), temperature (upper right), HCl (lower left) and BrO from SMILES Band A (lower right). 261 observations are averaged in Oct. 12, 2009 at equatorial region N10-S10. 11/07/28 IGARSS2011 Suzuki Band A Temp.
22. Fig. 5 Averaged retrieved profiles (red: moving antenna, blue: fixed antenna), relative difference normalized to a priori of L2 ver. 1.3 O 3 (upper left), temperature (upper right), HCl (lower left) and BrO from SMILES Band A (lower right). 261 observations are averaged in Oct. 12, 2009 at equatorial region N10-S10. 11/07/28 IGARSS2011 Suzuki Band A HCl Figure in the manuscript was mistake.
23. Fig. 5 Averaged retrieved profiles (red: moving antenna, blue: fixed antenna), relative difference normalized to a priori of L2 ver. 1.3 O 3 (upper left), temperature (upper right), HCl (lower left) and BrO from SMILES Band A (lower right). 261 observations are averaged in Oct. 12, 2009 at equatorial region N10-S10. 11/07/28 IGARSS2011 Suzuki Band A BrO
![JEM/SMILES Mission ,[object Object],[object Object],[object Object],[object Object],(JEM/SMILES: Superconducting Submillimeter-Wave Limb-Emission Sounder designed to be aboard the Japanese Experiment Module on ISS; Collaboration project of JAXA - Japan Aerospace Exploration Agency - and NICT - National Institute of Information and Communications Technology -) 1. Demonstration of superconductive mixer and 4-K mechanical cooler for the submillimeter limb-emission sounding in space 2. Observation on atmospheric minor constituents in the middle atmosphere [SIS Mixer] RF: 640 GHz, IF: 11-13 GHz; Junction: Nb/AlOx/Nb, ~7 kA/cm 2 ; Fabricated at Nobeyama RO [Mechanical Cooler] Two-stage Stirling and J-T; 20mW @4K, 200mW @20K, 1000mW @100K; Power Consumption: <300 W; Mass: 90 kg Aug. 23, 2010 Presentation at Hokkaido U.](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)