Mark4 Station Codes
The Mark4 correlation system represents stations with a single letter. Thus a 2-letter to 1-letter mapping is needed for each station. There is a default mapping (compiled in) which includes a number of stations and seven empty slots to be used as stations not in the table are encountered:
| Default Station Assignments | |||
|---|---|---|---|
| A òÆÔ Ai | B òÆÔ Bd | C òÆÔ Sh | D òÆÔ 13 |
| E òÆÔ Wf | F òÆÔ Eb | G òÆÔ Gb | H òÆÔ Ho |
| I òÆÔ Ma | J òÆÔ Cc | K òÆÔ Kk | L òÆÔ xx |
| M òÆÔ Mc | N òÆÔ Ny | O òÆÔ Kb | P òÆÔ Oh |
| Q òÆÔ Tc | R òÆÔ Zc | S òÆÔ Nt | T òÆÔ Ts |
| U òÆÔ Ur | V òÆÔ Wz | W òÆÔ xx | X òÆÔ On |
| Y òÆÔ Yb | Z òÆÔ Mh | a òÆÔ Ap | b òÆÔ Br |
| c òÆÔ Cm | d òÆÔ Cn | e òÆÔ xx | f òÆÔ Fd |
| g òÆÔ xx | h òÆÔ Hn | i òÆÔ xx | j òÆÔ Jc |
| k òÆÔ Kp | l òÆÔ La | m òÆÔ Mk | n òÆÔ Nl |
| o òÆÔ Ov | p òÆÔ Pt | q òÆÔ Qb | r òÆÔ Ro |
| s òÆÔ Sc | t òÆÔ Ti | u òÆÔ Ur | v òÆÔ Pv |
| w òÆÔ Wb | x òÆÔ xx | y òÆÔ Y | z òÆÔ xx |
As each station not in the table is found, an xx entry in the table above is assigned to that station and the corresponding single letter code is used thereafter. If you have more than seven stations not in this table, or if you wish to assign the single letters that will be used for each stations, you must supply a file with new mappings and inform difx2mark4 via an environment variable HOPS_STATION_CODE which should be the (local or absolute) path to a file with the new one-letter òÆÔ two-letter pairings. E.g.
A Aa
B Bb
C Cc
or equivalently
Aa A
Bb B
Cc C
Note that difx2mark4 enforces a one-to-one mapping, as bad things will happen if different stations were to be given the same one-letter identifier. (The hops software has no way to tell that this has happened, and difx2mark4 does not currently have any safeguard against this.) So if you wish to reassign one of the existing assignments, you must first make it an open slot (i.e. assign it to xx) and then assign it. E.g.
k xx
W Kp
k Hh
will shift Kp from k to W, and install Hh in the k slot.
