<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 08:00:00.000"
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="12.0">
<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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.20 (293) 08:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310200800009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.392" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.111" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.468" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="274.574" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.003" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.882" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.609" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.532" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="30.092" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="54.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.2 1.25 1.3 1.35 1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 220.000 220.000 220.000 221.000 222.000 223.000 224.000 225.000 225.000 226.195 227.390 228.585 229.780 230.975 232.170 233.365 234.560 235.755 236.950 238.145 239.340 240.535 241.730 242.925 244.120 245.315 246.510 247.705 248.900 250.095 251.290 252.485 253.680 254.875 256.070 257.265 258.460 259.655 260.851 262.046 263.241 264.436 265.631 266.826 268.021 269.216 270.411 271.606 272.801 273.996 275.191 276.386 277.289 278.284 279.384 280.606 281.974 283.513 285.259 287.256 289.563 292.258 295.447 299.280 303.975 310.000 320.000 330.000 340.000 365.000 400.171
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 66 0 0 0 0 60 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.953125 0.390625 -1.953125 0.390625 -0.390625 -1.953125 -0.390625 1.171875 0.390625 -0.390625 -1.953125 1.953125 -1.171875 -0.390625 1.171875 0.390625 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 0.390625 -2.734375 1.953125 -0.390625 0.390625 -0.390625 0.390625 2.734375 -0.390625 -0.390625 -0.390625 1.953125 0.390625 -1.953125 -0.390625 0.390625 -1.171875 2.734375 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="112">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.906 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.667 140.0 145.0 150.0 155.0 160.0 161.333 165.0 170.0 175.0 180.0 185.0 187.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 274.574 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.309 0.405 0.453 0.468 0.461 0.44 0.403 0.345 0.249 0.231 0.231 0.231 0.231 0.231 0.231 0.231 0.265 0.311 0.357 0.403 0.45 0.468 0.549 0.752 1.012 1.296 1.599 1.924 2.271 2.634 3.002 3.359 3.687 3.976 4.22 4.416 4.567 4.671 4.732 4.75 4.75 4.735 4.698 4.641 4.567 4.478 4.377 4.266 4.147 4.022 3.892 3.76 3.626 3.491 3.357 3.224 3.092 2.963 2.837 2.714 2.594 2.478 2.365 2.257 2.152 2.052 1.955 1.862 1.773 1.688 1.606 1.528 1.454 1.383 1.315 1.25 1.188 1.13 1.074 1.02 0.969 0.921 0.875 0.831 0.79 0.75 0.713 0.677 0.643 0.61 0.58 0.551 0.523 0.496 0.471 0.448 0.425 0.404 0.383 0.364 0.346 0.328 0.311 0.296 0.281 0.267 0.253 0.24 0.228 0.217 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.468" PeakHeight="110.0" Num="3" Error="0.0">
-21.739 3.986 -0.341
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.468" EndFrequency="4.75" PeakHeight="274.574" Num="5" zHalfNm="235.003" Error="1.968">
-96.3 11.459 -3.371 1.499 -0.861
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.0" Depth="0.237"/>
<TopsideChapman PeakHeight="274.574" PeakDensity="279931.75" PeakScaleHeight="30.092" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
