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资源说明：Haskell functionality for reading and writing ASCII minor planet (asteroid) databases.
asciidb-minorplanet
===================
(C) 2012 Pavel M. Penev
License: GPL
Haskell functionality for reading and writing ASCII minor planet (e.g.
asteroid) databases.
The Minor Planet Center's [observations
databases](http://www.minorplanetcenter.net/iau/ECS/MPCAT-OBS/MPCAT-OBS.html)
are supported as much as I could figure out their format. The Lowell
Observatory's asteroid orbits database
([ftp://ftp.lowell.edu/pub/elgb/astorb.html](ftp://ftp.lowell.edu/pub/elgb/astorb.html))
should be supported fairly well.
The creation and maintenance of this package has nothing to do with the Minor
Planet Center, the Lowell Observatory, or NASA. It was written for [LaRouche
PAC](http://larouchepac.com/), and the LaRouche Policy Institute.
# Reading Examples
## Minor Planet Center's Databases
```haskell
import Data.Binary (encode)
import qualified Data.ByteString.Lazy as LBS
import qualified Data.ByteString.Lazy.Char8 as LCh8
import Codec.Compression.GZip (decompress)
import qualified Data.ASCII.MinorPlanetCenter.Obs as MPCObs
-- Read all records from a database, and print ther Haskell representations,
-- followed by their database representations:
main = do
--bs <- LBS.readFile "NumObs.txt.gz"
bs <- LBS.readFile "UnnObs.txt.gz"
mapM_ (\r -> do putStrLn $ show r
LCh8.putStrLn $ encode r)
(MPCObs.getRecs $ decompress bs)
```
## Lowell Observatory's Database
```haskell
import Data.Binary (encode)
import qualified Data.ByteString.Lazy as LBS
import qualified Data.ByteString.Lazy.Char8 as LCh8
import Codec.Compression.GZip (decompress)
import qualified Data.ASCII.LowellObservatory.AstOrb as AstOrb
-- Read all records from the 'astorb.dat' database, and print ther Haskell
-- representations, followed by their database representations:
main = do
bs <- LBS.readFile "astorb.dat.gz"
mapM_ (\r -> do putStrLn $ show r
LCh8.putStrLn $ encode r)
(AstOrb.getRecs $ decompress bs)
```
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