<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 02:20:00.000"
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="18.0">
<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 1 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" >
2026.02.20 (051) 02:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202605102200220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="8.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.513" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.439" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" Name="h`F2" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="305.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.410" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="121">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 368.333 361.667 355.000 350.000 345.000 335.000 330.000 325.000 350.000 360.000 365.000 370.000 375.000 400.000 396.000 392.000 388.000 384.000 380.000 376.000 372.000 368.000 364.000 360.000 352.500 345.000 337.500 330.000 320.000 317.500 315.000 310.000 300.000 300.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 299.167 298.333 297.500 296.667 295.833 295.000 292.500 290.000 292.500 295.000 295.000 300.000 295.000 300.000 300.000 300.000 300.000 300.000 297.500 295.000 300.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 305.000 305.000 310.000 310.000 312.500 315.000 325.000 335.000 334.583 334.167 333.750 333.333 332.917 332.500 332.083 331.667 331.250 330.833 330.417 330.000 327.500 325.000 320.000 320.000 320.000 315.000 315.000 313.750 312.500 311.250 310.000 310.000 310.000 310.000 310.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 315.000 320.701 331.485 359.627
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 54 48 54 54 63 63 54 57 54 0 51 54 0 0 0 0 48 48 0 0 0 57 0 60 0 54 63 0 57 60 66 57 57 54 60 0 63 0 63 0 60 0 63 60 63 0 51 0 57 63 63 60 63 63 63 0 63 0 63 63 60 63 60 63 0 60 66 60 63 60 66 0 57 0 57 0 57 54 54 0 0 54 0 0 0 0 51 0 51 57 54 54 57 57 57 0 60 63 60 60 60 66 66 57 63 66 60 57 57 0 60 57 54 57 63 54 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.953125 1.953125 1.171875 0.390625 0.390625 1.953125 1.953125 2.734375 2.734375 2.734375 1.953125 2.734375 -0.390625 -1.953125 -2.734375 -1.171875 1.953125 1.953125 1.171875 2.734375 1.953125 1.171875 1.171875 -0.390625 1.171875 -1.171875 -1.953125 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 2.734375 1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -1.953125 -0.390625 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.953125 1.953125 1.953125 1.171875 1.171875 1.171875 -1.171875 -0.390625 1.171875 -2.734375 -2.734375 -0.390625 -1.953125 0.390625 -2.734375 2.734375 1.953125 2.734375 1.953125 1.953125 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 2.734375 0.390625 1.171875 2.734375 1.171875 1.171875 1.171875 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
