'+'
What you see here is a list of the fragments, or partially received transmissions, "); document.write("heard by the reporting stations. Fragments having a \"green\" score were reported as probable catches.
");
document.write("Available options: band= call= and last=
");
document.write("After band= you can specify one band code. You can use the 2-letter band codes (case doesn't matter),
");
document.write("or numbers 600 160 80 60 40 30 20 17 15 12 10 6 2 and 222 432 902 and 1296
");
document.write("After call= you can specify one callsign; only fragments received by that station will be shown.
");
document.write("After last= you can specify an interval (doesn't have to be an integer, either) in hours
"); document.write("Example: http://www.propnet.org/frag.php?last=2.5&band=10
"); } else { if(type=='C') { document.write("
What you see here is a display of the transmissions 'caught' via ");
document.write("PropNet over the requested time period. These are transmitted from one station via PSK31,");
document.write("received by another station, ");
document.write("reported to an Internet hub, stored in a database, and reported on these screens. ");
document.write("The thickness of the lines corresponds to the rate at which the path was reported. There are four thicknesses, ");
document.write("representing 1-3, 4-6, 7-9, and 10+ average reports/hour of the interval you selected.
");
document.write("Path Score: This is the number of times the transmitting station was heard by the receiving station on this band over the preceding hour, ");
document.write("divided by the number of times the transmitting station says he is transmitting in his self-report. It can be very wrong, including >100%, because ");
document.write("the transmitting station might have just started transmitting, changed bands, or transmitted extra probes. ");
document.write("Also, a receiving station will sometimes capture a signal in two segment windows.
"); document.write("Freq Δ: The relative difference in frequency "); document.write("between the received PSK31 stream frequency and the "); document.write("receiving station's eventual transmit frequency. The "); document.write("larger this number is, the further apart the two would "); document.write("appear in the waterfall. For RX-only participants, the "); document.write("TX frequency is assumed to be +1500 hz.
"); document.write("IMD: If the value in the IMD field is a percentage, the catch was not received perfectly, but was "); document.write("identified from a partial reception supported by the list of stations known to be active, "); document.write("and the number is the percentage of the identifying values received correctly. "); document.write("If the field contains 'NPN', this is a not a catch of a PropNET participant, "); document.write("but of another (NonPropNet) station transmitting near the PropNET anchor frequency. "); document.write("Otherwise, the IMD field contains the IMD value reported by the receiving station, which is subject "); document.write("to all the usual unreliability of such values, principally local noise.
"); } if(type=='S') { document.write("
What you see here is a display of the stations connected "); document.write("to the Internet who have reported their presence and operating"); document.write(" parameters within the requested time frame. Only the most recent "); document.write(" report for each band is shown.
"); } document.write("URL Options: You can display two types of maps, Google (default) or Original. The following URL options "); document.write("go after the URL in your address window. The first one is preceded by ? and the others start with &
");
document.write("Both maps: Available options include band= call= and last=
");
document.write("After band= you can specify one band code. You can use the 2-letter band codes (case doesn't matter),
");
document.write("or numbers 600 160 80 60 40 30 20 17 15 12 10 6 2 and 222 432 902 and 1296
");
document.write("After call= you can specify one callsign; only paths to or from that callsign will be shown.
");
document.write("After last= you can specify an interval (doesn't have to be an integer, either) in hours
");
document.write("Google maps: Available options also include center=, which can be followed by a location code ");
document.write("
from this list: us na sa eu af as oc eh wh nh sh ww -- try 'em all! Or try center=callsign
");
document.write("Mouse over a marker and then click on it.
");
document.write("Also, adding label=y will cause the callsign to be displayed next to the marker.
");
if (usingStarIcons) {
document.write("The icons topped by a yellow star represent stations that are Listening (or \"Lurking\") but not transmitting, ");
document.write("and the icons topped by a brown star represent Non-PropNet stations that were heard sending CQ.
");
} else {
document.write("The yellow L markers indicate stations that are Listening (or \"Lurking\") but not transmitting.
");
}
if(type=='S') {
document.write("Also, the \"Call\" field of a Lurker has a yellow background.
");
}
document.write("
Original maps: You must specify maptype=o, and you can also specify ");
document.write("a zoom level (zoom=1.5 or zoom=0.8, for example), or the URL of a .geo file after geo=
"); document.write("Example: http://www.propnet.org/catch.php?last=2.5&band=10¢er=na
"); document.write("Other Date Options: Instead of last=, you can specify date= (and optionally days=). This will "); document.write("request the data from a particular date or range of dates. The value for date= should be in the format "); document.write("yyyymmdd without any quotes, for example, &date=20080331. The value of days= defaults to &days=1. "); document.write("Alternatively, you can request any start date/time with the format yyyy-mm-dd+hh:mi; for example, 2009-07-11+12:30. "); document.write("And the days= value can be a real number; for example, use &days=0.04166 for one hour.
"); if(type=='C') { document.write("Table Data Limit: Most of the website's bandwidth is comsumed downloading the event table. "); document.write("As the usefulness of the data declines as more is displayed, the table is limited by default to 1000 rows. If you need "); document.write("more, you can set the limit as high as 2500 with &limit=nnnn, but if you need to do that often, please ask the "); document.write("webmaster for a better suggestion.
"); document.write("Download the table: You can save and later download the information in the table as a "); document.write("CSV file that can be loaded into Excel. You cause it to be created by declaring csv=filename, "); document.write("and find the file later at www.propnet.org/csv/filename.csv
"); } document.write("Want to know more? The PropNet story begins at our Home Page.
"); document.write("