Technical data

DOC-01-TELAS-CRG-4 ASTi ACE Studio Components Reference Guide Rev.M
186 Copyright © 2014 Advanced Simulation Technology inc.
15.3. HFServer
Summary: The HF Server component allows control of the HF Server Application
providing real-time, high-fidelity modeling of HF radios.
Description: The HF Server computes propagation effects between virtual radios,
taking into account such things as transmitter-receiver global position, season, time
of day (day-night terminator), and solar activity.
To properly simulate solar activity and seasonal/circadian effects on the ionosphere
and HF radio signal propagation, the HF Server requires that the Smoothed Sunspot
Number (SSN) and Time-of-Day offset be set. These parameters are set through use
of the HF Server component
Note: Configuration parameters related to the HF Server’s network behavior
including the interface and UDP port number to send/receive HF requests are set
via the DIS Gateway configuration in the Project.
Control Inputs
SSN
Type Default Value
uint32 0
Description: Smoothed Sunspot Number. Typical values of the
SSN range from 0 to 250, depending on past and current sunspot
activity. The default value for this variable is 100.
Control Inputs
Offset
Type Default Value
int32 0
Description: Time-of-Day offset in seconds between the HF Server
clock (local time in GMT) and the simulation time (in GMT).
For example, if the exercise is being conducted on the East coast of
the U.S., during summer (GMT +5), at the location's 8:00am (08:00
Eastern Standard Time), the HF Server's local clock would read
13:00 GMT. If the simulated scenario is taking place on the West
coast of the U.S., during summer (GMT +8) at the location's
3:30pm (15:30 Pacific Standard Time), then a clock in the simulated
world would read 23:30 GMT. The difference between the
simulated GMT (23:30) and the real-world GMT (13:00) is the
Time-Of-Day offset; namely, +10.5 hours.
Using this control, a user can force the HF Server to return results
for a night-time mission, even though the exercise is taking place
during the day. Likewise, seasonal effects typical of winter
propagation can be used in July. The default value for the time
offset is zero hours.
Domain-
NameIn
Type Default Value
string n/a
Description: Allows a host platform to configure the Domain name
string remotely. This input is typically used in conjunction with the
Control> NumtoString component. Refer to the DomainName
string definition for syntax.