Project under active development.
This is an implementation of the NASA Mars24 Sunclock algorithm developed by Dr. Michael D Allison, using the R programming language.
For more information, see:
The bulk of the calculations is performed by the function Mars24():
Mars24(datetime, tzone)
where
datetimeis a character string representing the Earth time that you want to convert to Martian time. The character string should be in the format'%Y-%m-%d %H:%M:%S'.tzoneis a character string representing the timezone of the Earth time that you want to convert to Martian time.
The output of Mars24() is a dataframe that corresponds to the examples documented on the "Algorithm and Worked Examples" page of the NASA Goddard Institute for Space Studies website.
For example:
## Example: January 6, 2000 (UTC)
Mars24('2000-01-06 00:00:00', 'UTC') %>%
print()## equation description value
## 1 A-1 Get a starting Earth time 9.471168e+11
## 2 A-2 Convert millis to Julian Date(UT) 2.451550e+06
## 3 A-3 Determine time offset from J2000 epoch (UT) 0.000000e+00
## 4 A-4 Determine UTC to TT conversion 6.418400e+01
## 5 A-5 Determine Julian Date (TT) 2.451550e+06
## 6 A-6 Determine time offset from JS2000 epoch (TT) 4.500743e+00
## 7 B-1 Determine Mars mean anomaly 2.174558e+01
## 8 B-2 Determine angle of Fiction Mean Sun 2.727457e+02
## 9 B-3 Determine perturbers 1.418321e-03
## 10 B-4 Determine Equation of Center 4.441927e+00
## 11 B-5 Determine aerocentric solar longitude 2.771876e+02
## 12 C-1 Determine Equation of Time -5.187746e+00
## 13 C-2 Determine Coordinated Mars Time 2.399425e+01