<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 05:40:00.000"
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 2 0 0 0 0 0 0 0 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, F2o cusp not found, One of F2 cusps was derived from the other</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" >
2026.10.27 (300) 05:40:00</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">
FF202630010270540009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.393" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.172" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="5.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="322.048" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.242" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.295" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="22.155" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.084" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="10.583" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="41.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="38">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 383.500 382.000 380.500 379.000 377.500 376.000 374.500 373.000 371.500 370.000 370.000 370.000 370.000 370.000 370.000 370.000 367.308 364.615 361.923 359.231 356.538 353.846 351.154 348.462 345.769 343.077 340.385 337.692 335.000 346.603
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 57 0 0 60 0 66 66 66 66 66 66 72 69 66 0 72 72 72 0 0 72 66 0 63 0 0 0 72 72 0 0 0 0 69 78 66
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 0.390625 -1.953125 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="77">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.748 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.497 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.245 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.048 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.314 0.289 0.255 0.209 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.237 0.258 0.28 0.301 0.323 0.344 0.354 0.425 0.541 0.676 0.844 1.045 1.265 1.487 1.704 1.915 2.12 2.321 2.521 2.721 2.922 3.127 3.338 3.556 3.787 4.034 4.308 4.63 5.65 5.61 5.388 5.036 4.611 4.158 3.707 3.278 2.88 2.519 2.195 1.908 1.656 1.434 1.241 1.073 0.928 0.801 0.692 0.597 0.516 0.445 0.384 0.331 0.286 0.247 0.213

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.65" PeakHeight="322.048" Num="5" zHalfNm="309.242" Error="9.328">
-71.491 -58.271 36.846 -15.991 4.104
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.245" Depth="0.154"/>
<TopsideChapman PeakHeight="322.048" PeakDensity="396060.78" PeakScaleHeight="10.583" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
