|
Collection:
|
|
NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
|
|
Title:
|
|
NEAR: From Planning to Data Analysis
Title
NEAR: From Planning to Data Analysis
Title
|
|
Original Caption Released with Image:
|
Planning and acquiring observations from NEAR's Near-Infrared Spectrometer (NIS) is a complex process that requires a detailed understanding of the strange shape and the rotational state of Eros. On February 13-14, 2000, just before insertion into Eros orbit, NEAR passed between Eros and the Sun. This geometry is called a low phase angle. It is optimum for spectroscopic observations, so at that time NIS obtained some of its most valuable data. To plan these activities in the preceding months, the NEAR science team developed a series of global NIS observation sequences like the one depicted in the left image. Here, NIS was instructed to scan its mirror back and forth across Eros while the spacecraft did a slow slew from top to bottom. The image shows the predicted coverage as viewed from directly over the north pole of a computerized "shape model" of Eros. Many such observation sequences were performed flawlessly on the spacecraft during the "low phase-angle flyby," and the highest-quality spectra were combined to show the resulting NIS coverage of Eros in the map on the right. The green and red regions show areas at high northern latitudes with the best coverage by NIS. Analysis of the NIS spectra is providing clues about the mineralogy and composition of Eros, and perhaps its early history and evolution. Built and managed by The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, NEAR was the first spacecraft launched in NASA's Discovery Program of low-cost, small-scale planetary missions. See the NEAR web page at http://near.jhuapl.…for more details.
Original_Caption_Rel eased_with_Image
Planning and acquiring observations from NEAR's Near-Infrared Spectrometer (NIS) is a complex process that requires a detailed understanding of the strange shape and the rotational state of Eros. On February 13-14, 2000, just before insertion into Eros orbit, NEAR passed between Eros and the Sun. This geometry is called a low phase angle. It is optimum for spectroscopic observations, so at that time NIS obtained some of its most valuable data. To plan these activities in the preceding months, the NEAR science team developed a series of global NIS observation sequences like the one depicted in the left image. Here, NIS was instructed to scan its mirror back and forth across Eros while the spacecraft did a slow slew from top to bottom. The image shows the predicted coverage as viewed from directly over the north pole of a computerized "shape model" of Eros. Many such observation sequences were performed flawlessly on the spacecraft during the "low phase-angle flyby," and the highest-quality spectra were combined to show the resulting NIS coverage of Eros in the map on the right. The green and red regions show areas at high northern latitudes with the best coverage by NIS. Analysis of the NIS spectra is providing clues about the mineralogy and composition of Eros, and perhaps its early history and evolution. Built and managed by The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, NEAR was the first spacecraft launched in NASA's Discovery Program of low-cost, small-scale planetary missions. See the NEAR web page at http://near.jhuapl.…for more details. Original Caption Released with Image
|
|
Addition Date:
|
|
2000-06-10
Addition_Date
2000-06-10
Addition Date
|
|
Produced By:
|
|
Johns Hopkins University/APL
Produced_By
Johns Hopkins University/APL
Produced By
|
|
Mission:
|
|
NEAR
|
|
Spacecraft:
|
|
NEAR Shoemaker
Spacecraft
NEAR Shoemaker
Spacecraft
|
|
Target Name:
|
|
Eros
Target_Name
Eros
Target Name
|
|
Is a satellite of:
|
|
Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
|
|
Instrument:
|
|
Near Infra-Red Spectrometer
Instrument
Near Infra-Red Spectrometer
Instrument
|
|
Product Size:
|
|
720 samples x 720 lines
Product_Size
720 samples x 720 lines
Product Size
|
|
Primary Data Set:
|
|
NEAR Home Page
Primary_Data_Set
NEAR Home Page
Primary Data Set
|
|
facet_what:
|
|
Sun
facet_what
Sun
facet_what
|
|
facet_what:
|
|
Spectrometer
facet_what
Spectrometer
facet_what
|
|
facet_what:
|
|
Infrared Spectrometer
facet_what
Infrared Spectrometer
facet_what
|
|
facet_what:
|
|
NEAR Shoemaker
facet_what
NEAR Shoemaker
facet_what
|
|
facet_what:
|
|
Near Infrared Mapping Spectrometer (NIMS)
facet_what
Near Infrared Mapping Spectrometer (NIMS)
facet_what
|
|
facet_where:
|
|
Maryland
facet_where
Maryland
facet_where
|
|
facet_where:
|
|
Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
|
|
Image #:
|
|
PIA02489
|
|
UID:
|
|
SPD-PHOTJ-PIA02489
UID
SPD-PHOTJ-PIA02489
UID
|
|
orignial url:
|
orignial_url
orignial url
|
