<?xml version="1.0"?>
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<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 02:40:00.000"
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="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) 02:40:00</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">
FF202605102200240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.867" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.873" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="265.815" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.230" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 295.000 287.500 280.000 295.000 300.000 295.000 285.000 275.000 270.000 265.000 257.500 250.000 250.000 250.000 250.000 247.500 245.000 240.000 235.000 233.333 231.667 230.000 232.500 235.000 235.000 235.000 235.000 240.000 245.000 246.053 247.105 248.158 249.211 250.263 251.316 252.368 253.421 254.474 255.526 256.579 257.632 258.684 259.737 260.789 261.842 262.895 263.947 265.000 267.500 270.000 270.000 270.000 268.333 266.667 265.000 262.500 260.000 257.500 255.000 252.500 250.000 255.000 260.000 265.000 275.000 275.000 274.286 273.571 272.857 272.143 271.429 270.714 270.000 267.500 265.000 265.000 265.000 265.000 270.000 265.000 265.000 265.000 265.000 265.000 260.000 261.250 262.500 263.750 265.000 265.000 265.000 255.000 260.000 260.059 260.124 260.198 260.281 260.377 260.487 260.616 260.769 260.953 261.178 261.461 261.825 262.313 263.002 264.046 265.815 269.468 281.439
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 0 63 54 57 63 63 57 0 63 0 63 0 0 63 0 63 0 66 0 0 60 0 0 0 0 69 69 63 0 0 60 66 0 0 0 72 72 0 63 0 0 0 0 0 0 60 63 0 63 63 57 0 60 63 0 66 0 66 0 63 66 66 63 57 60 0 0 0 0 63 63 63 0 69 66 0 69 60 72 0 0 66 69 66 0 0 0 69 69 66 66 69 69 72 69 0 72 69 60 66 66 57 0 0 60 69 60 63 69 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 -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 0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 1.171875 1.171875 0.390625 1.171875 -0.390625 1.953125 1.953125 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 1.953125 -0.390625 1.953125 1.171875 1.953125 -0.390625 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -0.390625 1.953125 -1.171875 -0.390625 -1.171875 -2.734375 -0.390625 -0.390625 -1.171875 1.953125 0.390625 -0.390625 0.390625 0.390625 -0.390625 -1.171875 -1.171875 0.390625 0.390625 1.953125 -1.171875 -1.171875 1.953125 -1.171875 1.171875 -1.171875 1.953125 1.171875 0.390625 -0.390625 0.390625 0.390625 -1.953125 -0.390625 -1.171875 -1.171875 0.390625 1.171875 -1.171875 0.390625 -1.171875 1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 -1.171875 1.171875 1.171875 -1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
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