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Comments about units.

This commit is contained in:
wb2osz 2021-01-01 21:12:07 -05:00
parent 6513efd052
commit 81447ed49f
1 changed files with 5 additions and 0 deletions
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5
src/decode_aprs.h
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@ -80,6 +80,8 @@ typedef struct decode_aprs_s {
char g_message_number[8]; /* Message number. Should be 1 - 5 characters if used. */ char g_message_number[8]; /* Message number. Should be 1 - 5 characters if used. */
float g_speed_mph; /* Speed in MPH. */ float g_speed_mph; /* Speed in MPH. */
/* The APRS transmission uses knots so watch out for */
/* conversions when sending and receiving APRS packets. */
float g_course; /* 0 = North, 90 = East, etc. */ float g_course; /* 0 = North, 90 = East, etc. */
@ -94,6 +96,9 @@ typedef struct decode_aprs_s {
float g_range; /* Precomputed radio range in miles. */ float g_range; /* Precomputed radio range in miles. */
float g_altitude_ft; /* Feet above median sea level. */ float g_altitude_ft; /* Feet above median sea level. */
/* I used feet here because the APRS specification */
/* has units of feet for alititude. Meters would be */
/* more natural to the other 96% of the world. */
char g_mfr[80]; /* Manufacturer or application. */ char g_mfr[80]; /* Manufacturer or application. */