<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 21:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="14.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.31 (304) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202630410312140009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="20" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.957" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.078" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="120.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="120.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="181.143" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.746" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="1.700" Description="Minimum frequency of Es-layer" Units="MHz" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="129">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 125.000 125.000 125.714 126.429 127.143 127.857 128.571 129.286 130.000 129.000 128.000 127.000 126.000 125.000 130.000 125.000 120.000 120.000 120.000 135.000 120.000 120.000 135.000 140.000 146.857 153.714 160.571 167.429 174.286 181.143 188.000 194.857 201.714 208.571 215.429 222.286 229.143 236.000 242.857 249.714 256.571 263.429 270.286 277.143 284.000 290.857 297.714 304.571 311.429 318.286 325.143 332.000 338.857 345.714 352.571 359.429 366.286 373.143 380.000 385.000 385.000 385.000 385.000 390.000 391.250 392.500 393.750 395.000 397.500 400.000 405.000 406.000 407.000 408.000 409.000 410.000 415.000 420.000 418.750 417.500 416.250 415.000 420.000 425.000 425.000 425.000 425.000 425.000 435.000 435.000 435.000 435.000 437.500 440.000 445.000 445.000 445.000 445.000 447.500 450.000 450.000 455.000 455.000 455.000 457.500 460.000 460.000 460.000 475.000 470.000 470.000 472.500 475.000 475.000 475.000 475.000 476.046 477.274 478.736 480.507 482.696 485.469 489.099 494.053 501.218
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 66 0 0 0 57 0 0 57 0 0 0 0 0 57 0 75 60 75 57 72 72 63 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 63 0 0 60 0 0 0 63 60 66 0 0 0 0 0 0 60 0 0 0 0 0 0 69 72 72 0 0 51 75 0 60 0 0 57 0 54 57 0 57 54 51 54 45 0 54 51 48 42 0 0 0 48 54 0 48 45 0 54 51 0 48 48 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 1.953125 -2.734375 2.734375 1.953125 2.734375 -0.390625 2.734375 2.734375 0.390625 1.953125 0.390625 0.390625 0.390625 -2.734375 0.390625 -0.390625 -0.390625 0.390625 -1.953125 -0.390625 -1.953125 0.390625 -1.171875 0.390625 -2.734375 1.171875 1.171875 -2.734375 -0.390625 0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 104.286 103.571 102.857 102.143 101.429 100.714 100.000 100.000 100.000 105.000 105.000 105.000 100.000 100.000 101.667 103.333 105.000 106.667 108.333 110.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 0 0 63 0 0 60 0 0 63 60 0 54 0 0 0 69 81
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
