<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 23:10:00.000"
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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o cusp, 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" >
2026.10.29 (302) 23:10:00</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">
FF202630210292310009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.409" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.692" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="6.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" 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="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="307.844" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.971" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.851" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="24.874" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.399" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="12.156" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="34.340" 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="83">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 325.000 320.000 320.000 320.000 320.000 320.000 320.000 315.000 315.000 315.000 315.000 315.000 313.000 311.000 309.000 307.000 305.000 310.000 310.000 310.000 310.000 310.000 310.476 310.952 311.429 311.905 312.381 312.857 313.333 313.810 314.286 314.762 315.238 315.714 316.190 316.667 317.143 317.619 318.095 318.571 319.048 319.524 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 325.000 320.000 320.000 320.000 320.357 320.714 321.071 321.429 321.786 322.143 322.500 322.857 323.214 323.571 323.929 324.286 324.643 325.000 325.000 325.000 325.000 320.000 315.000 315.000 315.000 320.000 325.000 325.000 330.000 340.785 368.927
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 69 60 63 0 63 69 0 60 66 63 0 69 63 0 66 66 57 63 66 0 57 57 63 0 63 66 0 69 0 66 66 0 63 0 0 66 0 57 0 0 0 63 0 60 66 63 63 57 63 57 0 63 60 60 63 60 0 63 0 0 57 0 0 0 0 0 0 60 66 0 0 57 66 60 60 63 60 63 60 60 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 -0.390625 1.953125 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 -0.390625 -0.390625 1.953125 1.171875 1.953125 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 1.171875 1.953125 1.953125 1.171875 1.953125 1.953125 0.390625 2.734375 1.953125 2.734375 1.953125 1.171875 1.171875 1.953125 0.390625 2.734375 1.171875 0.390625 1.953125 1.953125 1.953125 1.953125 1.953125 1.171875 1.953125 1.171875 1.171875 1.171875 2.734375 2.734375 1.171875 1.171875 1.171875 2.734375 2.734375 1.953125 1.953125 1.171875 1.953125 1.953125 2.734375 1.953125 0.390625 1.171875 1.171875 1.953125 1.953125 2.734375 1.171875 1.171875 2.734375 2.734375 1.171875 2.734375 1.953125 2.734375 0.390625 0.390625 2.734375 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="80">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.915 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.831 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.746 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 307.844 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0
</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 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.223 0.245 0.267 0.289 0.311 0.333 0.354 0.358 0.489 0.717 0.951 1.174 1.394 1.618 1.851 2.098 2.363 2.65 2.966 3.316 3.71 4.16 4.683 5.302 6.031 6.768 6.95 6.929 6.744 6.415 5.994 5.524 5.037 4.556 4.094 3.661 3.262 2.897 2.568 2.271 2.007 1.771 1.562 1.376 1.212 1.067 0.94 0.827 0.728 0.64 0.563 0.495 0.436 0.383 0.337 0.296 0.261 0.229 0.202

</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="6.95" PeakHeight="307.844" Num="5" zHalfNm="291.971" Error="3.115">
-74.002 -31.065 14.724 -1.077 -1.678
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.746" Depth="0.154"/>
<TopsideChapman PeakHeight="307.844" PeakDensity="599286.6" PeakScaleHeight="12.156" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
