RGT_cycle_14 {IceSat2R}

Reference Ground Tracks (RGTs) for IceSat-2 Cycle 14

Description

The data includes the following columns: "longitude", "latitude", "day_of_year", "Date", "hour", "minute", "second" and "RGT". The "RGT" column consists of 1387 Reference Ground Tracks (RGTs) for the IceSat-2 Cycle 14 (from 'December 22, 2021' to 'March 23, 2022')

Usage

data(RGT_cycle_14)

Format

An object of class data.table (inherits from data.frame) with 131765 rows and 8 columns.

Details

The following code snippet shows how to come to the "RGT_cycle_14" data. The same can be done with any of the available RGT Cycles. For the following code I utilized 8 threads to speed up the pre-processing of the downloaded .kml files (the code takes approximately 15 minutes on my Linux Personal Computer),

require(IceSat2R)
require(magrittr)
require(sf)

avail_cycles = available_RGTs(only_cycle_names = TRUE)
avail_cycles

idx_cycle = 14

choose_cycle = avail_cycles[idx_cycle]
choose_cycle

res_rgt_many = time_specific_orbits(RGT_cycle = choose_cycle, download_method = 'curl', threads = parallel::detectCores(), verbose = TRUE)

RGT_cycle_14 = sf::st_coordinates(res_rgt_many)
colnames(RGT_cycle_14) = c('longitude', 'latitude')
RGT_cycle_14 = data.table::data.table(RGT_cycle_14)
RGT_cycle_14$day_of_year = res_rgt_many$day_of_year
RGT_cycle_14$Date = as.Date(res_rgt_many$Date_time)
RGT_cycle_14$hour = lubridate::hour(res_rgt_many$Date_time)
RGT_cycle_14$minute = lubridate::minute(res_rgt_many$Date_time)
RGT_cycle_14$second = lubridate::second(res_rgt_many$Date_time)
RGT_cycle_14$RGT = res_rgt_many$RGT
RGT_cycle_14

References

https://icesat-2.gsfc.nasa.gov/science/specs

Examples

require(IceSat2R)
require(data.table)

data(RGT_cycle_14)