<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 09:10:00.000"
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="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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.20 (079) 09:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607903200910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.322" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.269" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.450" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" Name="h`Es" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.531" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.278" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="271.620" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="208.078" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.530" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="90.649" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.883" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.724" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="81.690" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.170" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.100" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 285.000 290.000 294.000 298.000 302.000 306.000 310.000 305.000 309.696 315.531 322.976 332.804 346.380 366.349 398.619 459.617 618.476
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 57 60 63 57 0 57 57 57 48 60 54 57 0 0 0 0 48 48 51 60 0 48 0 0 54 54 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 1.171875 0.390625 2.734375 2.734375 -1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 1.171875 1.953125 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 135.000 135.000 125.000 125.000 125.000 130.000 127.500 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.227 125.455 125.682 125.909 126.136 126.364 126.591 126.818 127.045 127.273 127.500 127.727 127.955 128.182 128.409 128.636 128.864 129.091 129.318 129.545 129.773 130.000 130.000 129.167 128.333 127.500 126.667 125.833 125.000 130.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 69 69 69 0 0 66 0 72 0 72 0 0 0 75 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 60 0 0 0 0 57 0 0 0 0 0 0 54 60 54
</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 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="162">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.051 95.0 100.0 105.0 110.0 115.0 120.0 123.089 125.0 130.0 135.0 136.177 140.0 145.0 149.266 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 271.62 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.853 1.107 1.237 1.278 1.256 1.187 1.118 1.118 1.118 1.118 1.118 1.165 1.226 1.278 1.3 1.458 1.63 1.812 2.003 2.203 2.414 2.64 2.883 3.143 3.422 3.711 3.999 4.271 4.515 4.727 4.906 5.055 5.177 5.277 5.356 5.416 5.459 5.487 5.499 5.5 5.498 5.485 5.463 5.432 5.393 5.346 5.293 5.233 5.167 5.096 5.021 4.942 4.86 4.775 4.687 4.597 4.506 4.414 4.32 4.226 4.132 4.037 3.943 3.849 3.756 3.663 3.571 3.481 3.391 3.303 3.216 3.13 3.046 2.963 2.882 2.803 2.725 2.649 2.574 2.501 2.43 2.36 2.292 2.226 2.161 2.098 2.037 1.977 1.919 1.862 1.807 1.753 1.701 1.65 1.601 1.553 1.506 1.461 1.417 1.374 1.333 1.292 1.253 1.215 1.178 1.142 1.107 1.074 1.041 1.009 0.978 0.948 0.919 0.891 0.864 0.837 0.812 0.787 0.763 0.739 0.716 0.694 0.673 0.652 0.632 0.613 0.594 0.576 0.558 0.541 0.524 0.508 0.492 0.477 0.462 0.448 0.434 0.421 0.408 0.395 0.383 0.371 0.36 0.349 0.338 0.327 0.317 0.307 0.298 0.289 0.28 0.271 0.263 0.255 0.247 0.239 0.232 0.225 0.218 0.211 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.278" PeakHeight="110.0" Num="3" Error="0.0">
-27.531 9.162 -1.58
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.278" EndFrequency="5.5" PeakHeight="271.62" Num="5" zHalfNm="208.078" Error="3.215">
-131.682 16.379 -10.558 4.547 -1.04
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="39.266" Depth="0.16"/>
<TopsideChapman PeakHeight="271.62" PeakDensity="375310.2" PeakScaleHeight="49.724" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
