2010 HyspIRI Science Workshop - NASA · 2010 HyspIRI Science Workshop NIRST Marraco 2 of 17 August...

2010 HyspIRI Science Workshop

21-24 August 2010Pasadena, California, USA

NIRSTDescription & operation

H. Marraco

2010 HyspIRI Science WorkshopNIRST Marraco

2 of 17August 24-26, 2010

BANDS

<2K @ 300K1.5K @ 300K2.5K @ 400KTemp. accuracy

11.4 – 12.3 µm10.4 – 11.3 µm3.4 – 4.2 µmBand Limits

Detectable size of fire event

NE∆T

Temperature

Central wavelength 11.85 µm10.85 µm3.8 µm

250K400KMin.

200m2 @ 1000K

<0.4K @ 300K<0.8K @ 300K<1.5K @ 400K

500K1000KMax.

LWIR3 (Band 3)LWIR2 (Band 2)MWIR2 (Band 1)


3 of 17August 24-26, 2010

Sun direction (-y)

Conceptual design


4 of 17August 24-26, 2010

GREEN: INO-CSABROWN: IARYELLOW: TINI AEROSPACEBLUE: GEMAMAGENTA: CDA INTERCORPORANGE: CIOP-GEMALIGHT BLUE: SFK-AMPEPRED: AXSYS TECHNOLOGIES

NIRST COMPONENTS


5 of 17August 24-26, 2010

Power connector

Data connector

Observing windowcovered with orange

plexiglass

SurvivalconnectorTransporting legs

Thermal radiator


6 of 17August 24-26, 2010

LWIRMWIR


7 of 17August 24-26, 2010

co-registration

11.8 µm

10.8 µm

3.8 µm

1 2 3 1 2 3

MWIR LWIR

OpticalAxes

Active lines:

Band 1: MWIR2Band 2: LWIR2Band 3: LWIR3

FPA

Pixel 1

Pixel 512


8 of 17August 24-26, 2010

NIRST Fields of View

Accessible Swath

FOV: 75.6 deg

Swath-Width FOV: 15.6 deg


9 of 17August 24-26, 2010

Revisit Scenario

Latitude Example location

Average revisit

interval (days)

Maximum missing

days

±67º Northern Canada 0.5 0

±55ºTierra del Fuego,

mid Canada0.7 1

±23º Jujuy 1.2 2

Virtual (1000 km swath) Nadir pointing (182 km swath)


10 of 17August 24-26, 2010

System Transfer Function


11 of 17August 24-26, 2010

Power vs counts


12 of 17August 24-26, 2010

Observing Canada/Italy/Argentina

0m-4m ~+10m

timeline

Heaters offCameras on

TECs offCameras offHeaters on

TECs on(stabilization

in less than 2m)

Move mirror0s to 30s

Acquire data26s to XXs

Repeat as necessary


13 of 17August 24-26, 2010

NIRST over Argentina & Canada


14 of 17August 24-26, 2010

Inland waters


15 of 17August 24-26, 2010

Weekly memory budget

Data acquisition rate: 53 kbytes/sec

Weekly (103 rev.) statistics:

29 downloads when SAC-D is 5 over horizon at Córdoba Ground station.92 virtual overflights of Canada and Italy.185 possible inland waters acquisitions (only those necessary to get weekly

complete data).

Assumptions:

1.All acquisitions over Argentina and inland waters in neighboring countries are downloaded in real time.2.Data stored in mass memory is downloaded at 130 kbytes/sec.3.Canada and Italy are covered in a TBD%.4.Inland waters are covered in a TBD%.


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17 of 17August 24-26, 2010



18 of 17August 24-26, 2010

Back up slides


19 of 17August 24-26, 2010

What we measure


20 of 17August 24-26, 2010

DVF (counts)


21 of 17August 24-26, 2010

DVF (power)

NEP@400k


22 of 17August 24-26, 2010

Pixel variety


23 of 17August 24-26, 2010

Active and reference (blind) pixels


24 of 17August 24-26, 2010

Blind pixel

Profile of BB at 4 μ

BAND |Signal@C| / |signal@B|[%]

MWIR 51% 18%

LWIR 13% 2%


25 of 17August 24-26, 2010

Blind pixel (MWIR)


26 of 17August 24-26, 2010

Priorities

1. Emergencies2. Instrument Health Care3. Science Group & AOs4. Common Users


27 of 17August 24-26, 2010

Calibration setup


28 of 17August 24-26, 2010

28C

19C

23C

16C

220C

34C

23C

Scans at the optical lab


29 of 17August 24-26, 2010

Pixel variety


30 of 17August 24-26, 2010


31 of 17August 24-26, 2010


32 of 17August 24-26, 2010

Pixels alongtrack (nadir)

(59ms @ 6.9 km/s ≅ 410 m 0.53 mrad @ 657 km ≅ 350 m)


33 of 17August 24-26, 2010

Integration

NIRST

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