Tuzzya n tfukt

Tugna sɣur NASA temmal-d tuzzya n tfukt.

Tuzzya n tfukt d amsekni yettbeddilen s unect n tehri taraklant acku tafukt d tin igebren seg plasma tagazawt. Isig n tuzzya yettili d afellay deg usebges n tfukt (Tehri n φ=0^o), tazzla ayi tettedras (tettenqas) yal mi ara ad ternu tehri. Dɣa tuzzya taneẓlayt n tfukt tettwaglam-d s tegda ayi:

$\omega =A+B\,\sin ^{2}(\varphi )+C\,\sin ^{4}(\varphi )$

Anda:

ω : d arured uɣmir yettwastgen s tseddart/ass.

φ: d tehri tanafukt, tettwasteg s tseddart.

A,B,C : d timezgitin tisengamin.

Atig n tmezgitin A,B,C mgaraden s unect n tarrayt yettusmersen i wakat d tanzagt takudant yettuzrawen. Imir-a, Atigen (azalen) imnummsanen yettwaddgen i tmezgitin-a ttunefken-d s:

A= 14.713 deg/day ± 0.0491.

B= –2.396 deg/day ± 0.188.

C= –1.787 deg/day ± 0.253.