<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-09 -068 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="18.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.03.09 (068) 08:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606803090800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.367" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.679" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="297.438" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="301.542" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="243.223" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.352" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="81.354" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.162" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.813" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="43">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 247.500 250.000 250.000 252.500 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 263.333 266.667 270.000 270.000 270.000 275.000 275.000 278.333 281.667 285.000 285.000 285.000 288.531 292.628 297.438 303.165 310.098 318.664 329.518 343.715 363.083 391.076 435.104 514.477
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 57 51 0 0 75 75 0 63 69 72 75 75 72 66 69 0 69 66 0 0 72 75 81 75 78 0 0 63 66 66 66 0 0 0 60 0 0 0 0 0 51 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 -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 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="155">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.247 145.0 150.0 155.0 160.0 165.0 170.0 172.495 175.0 180.0 185.0 190.0 195.0 200.0 203.742 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 301.542 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.301 0.266 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.237 0.262 0.286 0.311 0.336 0.354 0.443 0.574 0.695 0.833 1.008 1.265 1.818 3.304 3.874 4.218 4.466 4.657 4.81 4.932 5.031 5.108 5.168 5.21 5.237 5.249 5.25 5.247 5.232 5.207 5.171 5.125 5.071 5.01 4.941 4.867 4.787 4.703 4.615 4.524 4.43 4.334 4.236 4.138 4.038 3.938 3.838 3.738 3.639 3.541 3.443 3.347 3.251 3.158 3.065 2.975 2.886 2.799 2.714 2.631 2.549 2.47 2.392 2.317 2.243 2.172 2.102 2.034 1.968 1.905 1.842 1.782 1.724 1.667 1.612 1.559 1.507 1.457 1.408 1.361 1.316 1.272 1.229 1.188 1.148 1.109 1.072 1.035 1.0 0.967 0.934 0.902 0.872 0.842 0.813 0.786 0.759 0.733 0.708 0.684 0.661 0.638 0.617 0.596 0.575 0.556 0.537 0.518 0.501 0.484 0.467 0.451 0.436 0.421 0.406 0.392 0.379 0.366 0.354 0.341 0.33 0.319 0.308 0.297 0.287 0.277 0.268 0.258 0.25 0.241 0.233 0.225 0.217 0.21 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="5.25" PeakHeight="301.542" Num="5" zHalfNm="243.223" Error="10.205">
-128.894 49.897 -29.626 10.823 0.0
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.742" Depth="0.154"/>
<TopsideChapman PeakHeight="301.542" PeakDensity="341966.5" PeakScaleHeight="44.813" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
