A sphere with three ocean waves in differing shades of blue. Next to the sphere, there is the bolded text "Ocean Color". Under that, there are two acronyms, separated by a vertical pipe: OB.DAAC (Ocean Biology Distributed Active Archive Center) and OBPG (Ocean Biology Processing Group).
Lorem
ipsum
dolor
sit
amet
Toggle navigation
Ocean Color Science Software
Jump to content
ocssw
V2022
web
ocssw
ocssw_src
src
nav_seahawk
hawknav
jd.py
Go to the documentation of this file.
1
def
jd
(i,j,k):
2
# converted from: jd.f, Written by Frederick S. Patt, GSC, November 4, 1992
3
# Liang Hong, 2017/6/21
4
# Liang Hong, 2019/11/6: made it python 3 compatible, all calculations are integer based
5
6
# This function converts a calendar date to the corresponding Julian
7
# day starting at noon on the calendar date. The algorithm used is
8
# from Van Flandern and Pulkkinen, Ap. J. Supplement Series 41,
9
# November 1979, p. 400.
10
11
# Arguments
12
#
13
# Name Type I/O Description
14
# ---- ---- --- -----------
15
# i I*4 I Year - e.g. 1970
16
# j I*4 I Month - (1-12)
17
# k I*4 I Day - (1-31)
18
# jd I*4 O Julian day
19
20
import
numpy
as
np
21
i = np.array(i)
22
j = np.array(j)
23
k = np.array(k)
24
jd = 367*i - 7*(i+(j+9)//12)//4 + 275*j//9 + k + 1721014
25
return
jd
jd.jd
def jd(i, j, k)
Definition:
jd.py:1
