How to calculate the satellite zenith angle of each pixel of a satellite image based on the known data in the VNIR band

[jinyangwang11]

How to calculate the satellite zenith angle of each pixel of a satellite image based on the known data in the VNIR band of the AST_L1A file？

[LP DAAC - jwilson]

@jinyangwang11 I've forwarded your inquiry to our science team for further assistance.

[LP DAAC - jwilson]

@jinyangwang11 While we are waiting for further guidance on your inquiry, there is ASTER documentation at this link that might be useful at: https://lpdaac.usgs.gov/products/ast_l1av003/#documentation
Thank you,
Janice

[jinyangwang11]

@LP DAAC - jwilson
Thank you, I've downloaded the ASTER documents, but they don't seem to work. The documents don't involve the satellite zenith angle.

[LP DAAC - dgolon]

Hello @jinyangwang11 We are still waiting to hear back from the ASTER Science team but as soon as we do, we'll let you know.

[LP DAAC - jwilson]

@jinyangwang11 Our science team replied with the following calculation for solar zenith angle.

cos(θz) = sin(φ)sin(δ) + cos(φ)cos(δ)cos(h)

θz = SZA

φ = latitude

δ = solar declination

h = hour angle

Best regards,
Janice