<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 04:50:00.000"
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="15.0">
<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, F2x 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" >
2026.10.16 (289) 04:50:00</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">
FF202628910160450009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.963" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.518" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="351.429" 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="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="358.780" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="302.695" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.441" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.261" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.341" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.036" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.870" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 345.358 351.429 358.365 366.365 375.696 386.718 399.938 416.085 436.254 462.159 496.655 544.864 616.991
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 0 0 0 0 0 66 66 66 0 0 0 54
</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 0.390625 0.390625 -0.390625 0.390625 -0.390625 1.171875 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="160">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.752 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.505 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 220.257 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.78 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</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 0.262 0.219 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.227 0.248 0.269 0.29 0.311 0.332 0.353 0.354 0.413 0.495 0.594 0.708 0.833 0.969 1.118 1.281 1.461 1.662 1.886 2.136 2.411 2.706 3.011 3.31 3.591 3.846 4.069 4.262 4.425 4.561 4.672 4.759 4.825 4.87 4.894 4.9 4.9 4.89 4.869 4.837 4.796 4.745 4.687 4.622 4.55 4.473 4.391 4.306 4.217 4.126 4.032 3.937 3.841 3.744 3.647 3.55 3.453 3.357 3.262 3.167 3.074 2.982 2.892 2.804 2.717 2.632 2.549 2.467 2.388 2.311 2.235 2.162 2.09 2.021 1.953 1.888 1.824 1.763 1.703 1.645 1.588 1.534 1.481 1.43 1.381 1.333 1.287 1.242 1.199 1.157 1.116 1.077 1.04 1.003 0.968 0.934 0.901 0.869 0.839 0.809 0.78 0.753 0.726 0.7 0.676 0.652 0.629 0.606 0.585 0.564 0.544 0.525 0.506 0.488 0.471 0.454 0.438 0.422 0.407 0.393 0.379 0.365 0.352 0.34 0.328 0.316 0.305 0.294 0.284 0.273 0.264 0.254 0.245 0.236 0.228 0.22 0.212 0.205

</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="4.9" PeakHeight="358.78" Num="5" zHalfNm="302.695" Error="5.92">
-147.151 15.875 -10.874 5.565 -1.938
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="110.257" Depth="0.154"/>
<TopsideChapman PeakHeight="358.78" PeakDensity="297890.8" PeakScaleHeight="43.036" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
