The Characteristic of spectral reflectance of LAPAN-IPB (LAPAN-A3) Satellite and Landsat 8 over agricultural area in Probolinggo, East Java

LAPAN-IPB Satellite which was developed by the National Agency of Aeronautics
and Space (LAPAN) and Landsat 8 have quite equal specification. However, it is important to
investigate the difference of characteristic between the two satellites since the Landsat 8
commonly used by Indonesian researcher in the agriculture field for years. The study was done
in Probolinggo Regency which is located in East Java, Indonesia – has a large area of agriculture.
Satellite data of LAPAN A3/IPB used in the analysis of its spectral characteristic over
agricultural area was acquired on September 18, 2018, while the Landsat 8 image data was taken
from acquisition date on September 12, 2018. Field data measurement was done by collecting
spectral reflectance of some agricultural crops at study area consist of paddy, maize, sugar cane,
and onion. Spectral reflectance from the four crops are quietly the same, except for paddy which
has the lowest reflectance on peak of green band compared to other crops. Spectral profile of
LAPAN-A3/IPB on Blue, Green and Red band are always lower than Landsat 8, while the NIR
band is always higher. NDVI from Landsat 8 OLI ranged from -1 to 0.622844, while NDVI from
LAPAN-A3/IPB ranged from -1 to 0.461655. NDVI from Landsat is able to differentiate water

more clearly than LAPAN-A3/IPB, indicated by low NDVI value. It is concluded that LAPAN-
A3/IPB has quite similar spectral characteristic compared to Landsat-8 OLI. Although there is

some difference of spectral characteristic from some crops. It is recommended to consider the
age or growth stage of each crop.