STSAT-3 1 / 53 UN BSS Workshop, 22 Sep 2009 KASI

STSAT-3 2 / 53 UN BSS Workshop, 22 Sep 2009 KASI - Korea Sci & Tech Satellite (STSAT) began Korea Sci & Tech Satellite (STSAT) began FIMS : KASI developedFIMS,Main Payload of STSAT-1, - FIMS : KASI developed FIMS, Main Payload of STSAT-1, in collaboration with KAIST & UC Berkeley in collaboration with KAIST & UC Berkeley - STSAT-1 (FIMS) Launched in STSAT-1 (FIMS) Launched in FIMS Science Results were Published on ApJL in FIMS Science Results were Published on ApJL in STSAT-3 Program started in STSAT-3 Program started in KASI Proposal, MIRIS was Chosen as Main Payload - KASI Proposal, MIRIS was Chosen as Main Payload - MIRIS is compact wide-field IR Space Telescope - MIRIS is compact wide-field IR Space Telescope [ M ulti-purpose I nfra- R ed I maging S ystem ] [ M ulti-purpose I nfra- R ed I maging S ystem ] Background

STSAT-3 3 / 53 UN BSS Workshop, 22 Sep 2009 KASI STSAT1 – FIMS (Far UV IMaging Spectrograph)

STSAT-3 4 / 53 UN BSS Workshop, 22 Sep 2009 KASI FIMS Optical System Grating L & S Parabolic Cylinder Mirror UV Lights From Space Slit & Shutter Assembly Detector Assembly

STSAT-3 5 / 53 UN BSS Workshop, 22 Sep 2009 KASI FIMS Flight Model Mirror house Vacuum Box Card Cage Structure Opening Door Sun Warning Sensor Vacuum Pumping Port Vacuum Valve Shaft Shutter box Detector Box Amp Unit Enable Plug

STSAT-3 6 / 53 UN BSS Workshop, 22 Sep 2009 KASI FIMS & STSAT-1 (Sci & Tech SAT-1 )

STSAT-3 7 / 53 UN BSS Workshop, 22 Sep 2009 KASI

STSAT-3 8 / 53 UN BSS Workshop, 22 Sep 2009 KASI Launch : 27 Sep 2003 Russia, Plesetsk By Cosmos Rocket Successfully Launched

STSAT-3 9 / 53 UN BSS Workshop, 22 Sep 2009 KASI FIMS : Main Science Supernova Explosion Models for Hot Gas To Study Distribution, Properties of Hot Gas, ISM in Galaxy ? What’s the nature of the Hot Gas in our Galaxy ? Still Unknown... Galaxy

STSAT-3 10 / 53 UN BSS Workshop, 22 Sep 2009 KASI

STSAT-3 11 / 53 UN BSS Workshop, 22 Sep 2009 KASI FIMS Heritage ApJL, 2006, Vol 644, Special Issue - First results from the FIMS Mission - 9 papers published including Instruments & System Performances Total diffuse intensity map of the sky for the SPEAR/FIMS L-band ( A) observations. Evident features include the Galactic plane, the Sco-Cen association, and the LMC.

STSAT-3 12 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Multi-purpose Infra-Red Imaging System The Main Payload of STSAT-3

STSAT-3 13 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Project Summary Objectives –Space observation camera (SOC) Pa-α emission line Galactic plane survey Extragalactic Cosmic IR Background (CIB) observation –Earth observation camera (EOC) Wide angle NIR imaging of Korean peninsula Developing space IR technologies Duration : ~ (4 years) Budget : ~ 3M USD Participants : KASI, KBSI, SNU, Green Optics Spacecraft : STSAT-3 (SaTReC, KAIST)

STSAT-3 14 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS : Scientific Goal (1/3) Galactic Plane Survey (1/2) Origin of the Warm Ionized Medium (WIM) –Challenge to the current paradigm of the Ionization theory –Test the effect of Dust scattering for the WIM observation Observation : Pa  survey –Pa  (MIRIS) vs. H  (Ground-based) : Scattering difference –Pa  is better than H  in the turbulence study of the WIM because of the lower dust-extinction Hαmap from a ground-based survey

STSAT-3 15 / 53 UN BSS Workshop, 22 Sep 2009 KASI Scientific Goal (2/3) Galactic Plane Survey (2/2) Physical Properties of Turbulence in the Galaxy –Survey the physical parameters of turbulence in the Galaxy –Derive Magnetic field strength from the structure characteristics of turbulence Observation : Pa  survey –Pa  (MIRIS) vs. H  (Ground-based) : Extinction difference Measurement of the turbulence structure Turbulence model

STSAT-3 16 / 53 UN BSS Workshop, 22 Sep 2009 KASI Scientific Goal (3/3) Cosmic Infrared Background (CIB) Observation Origin of the Near-IR CIB –Test the hypothesis of the Pop III origin –Confirm the degree-scale fluctuation suggested by IRTS & AKARI and reveal its nature Observation : I & H-band –I-band (no Pop III) vs. H-band (Pop III expected) Matsumoto et al Spectral bump suspected to be redshifted from the Pop III Ly-cutoff Degree-scale fluctuation in the power spectrum from IRTS

STSAT-3 17 / 53 UN BSS Workshop, 22 Sep 2009 KASI Filters: I & H bands Blank (dark calibration) CIB dedicated phase: 1 month Primary target NEP (North Ecliptic Pole) –6.2 sq. deg. observed by AKARI –Whole area: 10 o x10 o –7 x 7 fields –1 sec. integration x 600 frames Secondary targets –SEP (South Ecliptic Pole) –NGP (North Galactic Pole) –SGP (South Galactic Pole) CIB Observational Plan : AKARI Obs Region MIRIS NEP Obs Region : MIRIS FoV

STSAT-3 18 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS System Design

STSAT-3 19 / 53 UN BSS Workshop, 22 Sep 2009 KASI STSAT-3 Layout Space Observation Camera Earth Observation Camera Secondary Payload, COMIS Sun Avoidance = ±90 degree Earth Avoidance = ±30 degree Sun Avoidance = ±30 degree Star Tracker

STSAT-3 20 / 53 UN BSS Workshop, 22 Sep 2009 KASI STSAT-3 Summary ItemSpecification Mission Orbit400 ~ 800 km, Sun synchronous (2011, TBC) Mission Life2 years Satellite Mass~ 135 kg Power~ 286 W Attitude control 3-axis stabilized, Pointing knowledge : 0.13 o, pointing stability : o DownlinkS-band (19.2 kbps), X-band (10 Mbps)

STSAT-3 21 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Specifications Space Obs. Camera (SOC) Wavelength0.9 – 2 um Aperture80 mm Focal ratiof/2 Pixel FOV51.6 arcsec Detector FOV3.67 o x 3.67 o Ground pixel size Swath width SensorTeledyne PICNIC FilterFilter Wheel (6 filters) Telescope Temp K (passive cooling) Sensor Temp77 K PerformanceMTF > 60%

STSAT-3 22 / 53 UN BSS Workshop, 22 Sep 2009 KASI

STSAT-3 23 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Sensitivity Filters: I & H bands, Blank 1sec 600 frame Readout noise = 40 e- Photon noise Thermal emission Zodiacal light Extragalactic component Expected Sensitivity (3  ) (Instrumental noise only) I band: 18.0 AB mag. H band: 17.8 AB mag.

STSAT-3 24 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Space Observation Camera (SOC)

STSAT-3 25 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Space Observation Camera (SOC)

STSAT-3 26 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Optics Specification Specifications of Space Observation Camera –Wavelength: 0.9 ~ 2  m − Aperture: 80 mm –Pixel FOV: 51.6 arcsec − Detector FOV: 3.67 o x 3.67 o –Telescope & Sensor Temp.: 180 ~ 200K (Passive Cooling), 100K –Filters (6 filters) I (1.05  m), H (1.6  m), blank Pa  (1.876  m), Pa  Cont1, Pa  Cont2 Pa  Cont1, Pa  Cont2 → Double band filter

STSAT-3 27 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Array Specification ParameterSpecification Detector technologyHgCdTe(PACE) Detector input circuitSFD Readout modeRipple(per quadrant) Pixel readout rateUp to 200kHz Pixel format256x256 Pixel pitch40um Fill factor>90 Output ports4 total(1 per quadrant) Clocks6 Spectral range0.9 ~ 2.5um Quantum Read noise: multiple sample<20 Dark current<0.2 Well capacity200,000 e- Pixel operability>99% PICNIC sensor

STSAT-3 28 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC Filter System Purpose IDCWL (um)FWHM (um) Cosmic Infrared Background I H Galactic Plane Survey Pa alpha Pa alpha cont Pa alpha cont Dark & ShutterBlank

STSAT-3 29 / 53 UN BSS Workshop, 22 Sep 2009 KASI Performance of SOC Optics Field (degree) RMS spot size (um)

STSAT-3 30 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC Layout

STSAT-3 31 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC Optics Operation temp. : 300K => 180K Flexure Barrel Spacer Retainer Lens Flexure G1 G2 G3 G4 G5

STSAT-3 32 / 53 UN BSS Workshop, 22 Sep 2009 KASI Fabricated Parts Re-assembly * For Lens Stress Re-calculation, Lens Gap Inspection, and Lens Contact Inspection Unit: mm

STSAT-3 33 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC Dewar

STSAT-3 34 / 53 UN BSS Workshop, 22 Sep 2009 KASI Assembled SOC Dewar Layout

STSAT-3 35 / 53 UN BSS Workshop, 22 Sep 2009 KASI Attitude control requirements ItemAxisMIRIS Req. (3σ)Bus Spec. (3σ)Remarks Attitude update rate> 1 Hz1~4 Hz Pointing Knowledge x, z< ±0.13 o ±0.12 o Refer to Mosaic overlap requirements y< ±0.22 o ±0.15 o Field shift by rotation < 1 pixel Pointing Accuracy x, z< ±0.13 o ±0.13 o Refer to Mosaic overlap requirements Y< ±0.22 o ±0.16 o Field shift by rotation < 1 pixel Stability (Drift+Jitter) x, z< ±0.007 o /sec±0.007 o /sec< 1 pixel y< ±0.070 o /sec±0.052 o /sec Drift by rotation + x, z drift < 1 pixel

STSAT-3 36 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC : Pa  cont. & Dual-band filter Unit Frame Size 1.2 Mbit/frame (256x256 센서 1 개, 16bit) 1 Day Obs Frame CIB Priority Obs 6,000 frame/day (600 frame/orbit x 10 orbits) Normal Obs 3,600 frame/day (GP : 600 frames x 4 orbits) (CAL : 600 frames x 2 orbits) 1 day Data Production * CIB Priority Obs 7 Gbit/day (6,000 frame/day x 1.2 Mbit/frame) Normal Obs 4.2 Gbit/day (3,600 frame/day x 1.2 Mbit/frame) * RS Encoding & Packet frame were NOT included Data Communication Requirements

STSAT-3 37 / 53 UN BSS Workshop, 22 Sep 2009 KASI Passive Cooling for SOC (1/2)

STSAT-3 38 / 53 UN BSS Workshop, 22 Sep 2009 KASI Passive Cooling for SOC (1/2) Temperature profile during one orbit (1) The telescope can be cooled below the goal temperature of 200K (2) The detector can be cooled below the goal temperature of 80K

STSAT-3 39 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Electronics

STSAT-3 40 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Electronics Box

STSAT-3 41 / 53 UN BSS Workshop, 22 Sep 2009 KASI SOC Electronics Q1Q2 Q3Q4 AMPADC PATTERN GENERATOR 4 channel VIDEO Siganal Processing IMAGE DATA DECODER AMPADC AMPADC AMPADC FPGA MEMEORY IMAGE BUFFER CONTROL COMMAND MMS GSE DSP UNIT PICNIC 256  256 ARRAY BIAS CLOCK FIFO SOC READOUT UNIT

STSAT-3 42 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Operation

STSAT-3 43 / 53 UN BSS Workshop, 22 Sep 2009 KASI Observation Plan CIB : NEP/SEP Galactic plane survey : Eclipse period

STSAT-3 44 / 53 UN BSS Workshop, 22 Sep 2009 KASI MIRIS Operation Concept ModeTest (3 months)1 st Year2 nd Year Bus Test 10 orbits/day (1 month) (if needed) Space Observation -Galactic Plane -Cosmic Background -Calibration (1 month) 4 orbits/day 2 orbits/day 6 orbits/day 2 orbits/day User time (if needed) Earth Observation (1 month) 2 orbits/day Regular Test & Emergency Observation 6 orbits/day Ground Contact4 orbits/day

STSAT-3 45 / 53 UN BSS Workshop, 22 Sep 2009 KASI Plan for Galactic Plan Survey 6°

STSAT-3 46 / 53 UN BSS Workshop, 22 Sep 2009 KASI Plan for Galactic Plan Survey

STSAT-3 47 / 53 UN BSS Workshop, 22 Sep 2009 KASI Current Status : Dewar

STSAT-3 48 / 53 UN BSS Workshop, 22 Sep 2009 KASI ~ (Genesia) Current Status : Optics

STSAT-3 49 / 53 UN BSS Workshop, 22 Sep 2009 KASI Test Plan Optics Lens (SO, EO) Barrel (SO, EO) Baffle (SO, EO) Optics Lens (SO, EO) Barrel (SO, EO) Baffle (SO, EO) Mechanics E-box Dewar/Filters (SO) Cooler box/Cooler (SO) Skin (SO, EO) MLI (SO) Supporters (SO) Mechanics E-box Dewar/Filters (SO) Cooler box/Cooler (SO) Skin (SO, EO) MLI (SO) Supporters (SO) Part Module System Electronics PCBs Harness/Connectors Sensors Electronics PCBs Harness/Connectors Sensors Environmental test Vibration test Thermal/Vac test Environmental test Vibration test Thermal/Vac test Optics SO Function test EO Function test Optics SO Function test EO Function test Mechanics Filter wheel test (SO) Mechanics Filter wheel test (SO) Electronics Image acquisition (SO) Image acquisition (EO) SCIF test Radiation test Electronics Image acquisition (SO) Image acquisition (EO) SCIF test Radiation test SO Cooling test Focus test Noise test SO Cooling test Focus test Noise test EO Field test EO Field test Test Equipment Vacuum chamber Collimator Light source GSE

STSAT-3 50 / 53 UN BSS Workshop, 22 Sep 2009 KASI Integrating sphere Monochrometer Collimator & Optical Table Thermal-cryo vacuum chamber Test Equipment

STSAT-3 51 / 53 UN BSS Workshop, 22 Sep 2009 KASI Data Reduction Pipeline After post-processing, the observations of Galactic plane and CIB are processed by the individual pipeline. Local Data Server Preprocessing Main Processing Post-processing data formatting pointing data + observation data observing log register to database Un-calibrated data Calibrated data mask bad/dead pixels mask saturated pixels subtract dark remove cosmic rays correct signal linearity flatten pixels correct distortion resampling image correct shift & rotation between images adjust sky level coadding of images Galactic Plane Survey CIB Observations

STSAT-3 52 / 53 UN BSS Workshop, 22 Sep 2009 KASI Summary Pa-  survey –MIRIS is optimized for Pa-  emission line survey from diffuse WIM in the Galactic plane CIB Observation –Detecting the Cosmic Infrared Background is important to understand the birth and the evolution of the first stars –The combination of field of view and band coverage makes MIRIS unique and complementary to other space-borne measurements with HST, Spitzer, and AKARI on finer angular scales. Current status –EQM environment test –CDR in September 2009

STSAT-3 53 / 53 UN BSS Workshop, 22 Sep 2009 KASI Thank you