在使用windows桌面搜索的时候，预览功能相当方便，但我碰到的一个奇怪问题是，
预览生成的临时文件存放在 file:///C:/recycled/Temporary%20Internet%20Files/ 目录下面
而用资源管理器无法打开 file:///C:/recycled/Temporary%20Internet%20Files/ 这目录
原因：
因为如果recycled目录属性为 +SH即系统且隐藏，则在资源管理器里看不到其下文件或目录。该目录有默认的回收站的显示方式。奇怪的是，临时目录本来不应该存放在此，但可能 office 2007 或 windows 桌面搜索使用自己的配置来存放临时文件。
解决办法：
Attrib -s -h c:/recycled
DOS下执行以上命令即可重新使用 windows 桌面搜索来预览 doc 等需要转为 mht 的文件了。
GGA Global Positioning System Fix Data. Time, Position and fix related data
for a GPS receiver
Time | Lat N Long E qua #s dilu alt M at' M age chk |
1 | 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
$--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x, xx, x.x,x.x,M, x.x, M, x.x,xxxx*hh
1) Time (UTC)
2) Latitude
3) N or S (North or South)
4) Longitude
5) E or W (East or West)
6) GPS Quality Indicator,
0 - fix not available,
1 - GPS fix,
2 - Differential GPS fix
7) Number of satellites in view, 00 - 12
8) Horizontal Dilution of precision
9) Antenna Altitude above/below mean-sea-level (geoid)
10) Units of antenna altitude, meters
11) Geoidal separation, the difference between the WGS-84 earth
ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level below ellipsoid
12) Units of geoidal separation, meters
13) Age of differential GPS data, time in seconds since last SC104
type 1 or 9 update, null field when DGPS is not used
14) Differential reference station ID, 0000-1023
15) Checksum
GSA GPS DOP and active satellites
list of satellites number
1 | 2 3 14 15 16 17 18 |
Sel Md | Md IDs… IDs PDOP HDOP VDOP chk |
$--GSA, a, a, x, x,x,x,x,x,x,x,x,x,x,x, x.x, x.x, x.x *hh
1) Selection mode
2) Mode
3) ID of 1st satellite used for fix
4) ID of 2nd satellite used for fix
...
14) ID of 12th satellite used for fix
15) PDOP in meters
16) HDOP in meters
17) VDOP in meters
18) Checksum
GSV Satellites in view
1 | 2 3 {4 5 6 7 } n |
tot | mn #s {sn elv azi snr} chk |
$--GSV, x, x, x, x, x, x, x, ...*hh
1) total number of messages
2) message number
3) satellites in view
4) satellite number
5) elevation in degrees
6) azimuth in degrees to true
7) SNR in dB
more satellite infos like 4)-7)
n) Checksum
RMC Recommended Minimum Navigation Information
12
1 2 3 4 5 6 7 8 9 10 11|
| | | | | | | | | | | |
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a*hh
1) Time (UTC)
2) Status, V = Navigation receiver warning
3) Latitude
4) N or S
5) Longitude
6) E or W
7) Speed over ground, knots
8) Track made good, degrees true
9) Date, ddmmyy
10) Magnetic Variation, degrees
11) E or W
12) Checksum
RMC Recommended Minimum Navigation Information
12
1 2 3 4 5 6 7 8 9 10 11|
| | | | | | | | | | | |
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a*hh
1) Time (UTC)
2) Status, V = Navigation receiver warning
3) Latitude
4) N or S
5) Longitude
6) E or W
7) Speed over ground, knots (1 knots = 1852 meters per hour = 0.514444 meters per seconds)
8) Track made good, degrees true
9) Date, ddmmyy
10) Magnetic Variation, degrees
11) E or W
12) Checksum
VTG Track Made Good and Ground Speed
1 2 3 4 5 6 7 8 9
| | | | | | | | |
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K*hh
1) Track Degrees
2) T = True
3) Track Degrees
4) M = Magnetic
5) Speed Knots
6) N = Knots
7) Speed Kilometers Per Hour
8) K = Kilometres Per Hour
9) Checksum
