planNVU: Obtain NVU navigational data for a flight plan
In thlytras/rfgfs: Flight planner and companion package for FlightGear

Description Usage Arguments Value Examples

This function gets a flight plan as input (i.e. a list of waypoints and geographical coordinates) and calculates appropriate data to feed the NVU navigational computer of the Tu-154B.

1 2	planNVU(plan, points = NULL, cols = c("fix", "fixLat", "fixLon"), init.mag = FALSE, merge = TRUE)

`plan`	A flight plan, as a data.frame. Plans created with `planRoute` are accepted as input. At a minimum, the data frame.should have three columns: waypoint names, latitudes and longitudes.
`points`	An optional vector of row numbers or waypoint names to select from the flight plan.
`cols`	An optional vector of column names, if these are named differently in `plan`
`init.mag`	At the initial waypoint, does the HSI show magnetic heading (instead of true heading)?
`merge`	Merge the NVU data into `plan`?

If merge = FALSE, returns a matrix with columns ZPY, S and da. ZPY (orthodromic HSI course heading) and S (leg distance, negated) can be fed to the NVU panels. da is the azimuth correction at each waypoint.

If merge = TRUE the above columns are added to the data.frame plan.

# Fly from Athens to Samos island
plan1 <- planRoute("LGAV", "LGSM", "KEA", "URNIL")
print(plan1)

# Calculate the data for the NVU
plan1 <- planNVU(plan1, init.mag=TRUE, merge=TRUE)

# We don't need to split the route into so many NVU legs.
# Let's only focus on waypoints with course changes, and recalculate
#     the NVU data with fewer, more manageable legs:
plan1 <- planNVU(plan1,
                 points = c("LGAV","KEA", "RIPLI", "IKARO", "URNIL"),
                 init.mag=TRUE, merge=TRUE)


# Create a flight plan from Moscow (Sheremetyevo) to Tashkent
plan2 <- planRoute("UUEE", "UTTT", "DK", "DODUR")

# It helps if we visualize the plan, by writing it on a KML file:
makeKml(plan2, "UEEE-UTTT.kml")

# Calculate the data for the NVU
plan2 <- planNVU(plan2, c("UUEE", "DK", "FV", "QL", "UWPP", "OG", "URL",
                          "KEKUN", "EL", "NKZ", "MIKNO", "DODUR", "UTTT"),
                 init.mag=TRUE, merge=TRUE)