<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 00:30:00.000"
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, F2o cusp not found, Multiple candidates for F2x 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" >
2026.10.25 (298) 00:30:00</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">
FF202629810250030009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="23" >
<URSI ID="00" Val="7.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.140" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.646" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.150" 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="88" Val="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="381.130" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="327.073" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="294.845" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="47.718" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.898" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.900" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="49.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.690" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 310.000 315.000 320.000 320.000 320.000 319.167 318.333 317.500 316.667 315.833 315.000 315.000 315.000 315.000 315.000 315.000 314.063 313.125 312.188 311.250 310.313 309.375 308.438 307.500 306.563 305.625 304.688 303.750 302.813 301.875 300.938 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 304.500 309.000 313.500 318.000 322.500 327.000 331.500 336.000 340.500 345.000 355.000 360.000 365.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.101 375.218 375.355 375.518 375.714 375.955 376.259 376.653 377.184 377.942 379.107 381.130 385.511 402.132
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 0 60 60 63 57 0 0 0 0 63 69 0 60 69 63 0 0 0 0 69 0 0 0 63 0 0 63 0 0 72 0 69 66 0 0 0 66 0 66 0 0 0 0 69 0 60 60 63 60 0 0 66 60 60 63 63 63 60 57 60 0 63 63 60 0 0 69 0 0 0 0 0 66 63 0 60 57 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.171875 0.390625 -1.953125 -1.171875 1.171875 -1.953125 0.390625 -1.953125 1.171875 -1.171875 -1.171875 -0.390625 0.390625 1.171875 -1.171875 -0.390625 1.171875 1.171875 -0.390625 -1.171875 -1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 -1.171875 -1.171875 1.953125 1.171875 -1.171875 0.390625 -0.390625 -1.171875 2.734375 -0.390625 -0.390625 -1.171875 0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.171875 2.734375 2.734375 1.953125 2.734375 2.734375 1.953125 2.734375 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 -0.390625 2.734375 2.734375 1.953125 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="116">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.63 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.261 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.891 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 327.073 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.293 0.261 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.228 0.249 0.27 0.291 0.312 0.333 0.354 0.357 0.503 0.66 0.849 1.079 1.354 1.674 2.03 2.416 2.824 3.25 3.692 4.146 4.611 5.085 5.566 6.047 6.52 6.969 7.366 7.671 7.834 7.85 7.839 7.772 7.652 7.488 7.288 7.06 6.812 6.548 6.275 5.996 5.716 5.437 5.162 4.893 4.631 4.377 4.133 3.899 3.675 3.461 3.257 3.064 2.88 2.707 2.542 2.387 2.241 2.103 1.973 1.851 1.736 1.628 1.527 1.431 1.342 1.258 1.179 1.105 1.035 0.97 0.909 0.852 0.798 0.748 0.701 0.656 0.615 0.576 0.54 0.506 0.474 0.444 0.416 0.389 0.365 0.342 0.32 0.3 0.281 0.263 0.246 0.231 0.216 0.203

</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="7.85" PeakHeight="327.073" Num="5" zHalfNm="294.845" Error="3.312">
-102.79 -9.793 7.61 -3.474 1.265
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.891" Depth="0.154"/>
<TopsideChapman PeakHeight="327.073" PeakDensity="764547.1" PeakScaleHeight="23.9" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
