<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 23:30:00.000"
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="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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.01 (060) 23:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003012330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.710" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.835" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" 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="4.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="423.597" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="368.157" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.761" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.161" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.839" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.093" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="92.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 427.500 430.000 430.000 432.500 435.000 436.000 437.000 438.000 439.000 440.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 490.000 500.000 510.000 515.000 527.474 542.413 560.627
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 57 60 0 63 63 66 60 0 60 0 63 66 66 63 63 63 63 51 0 60 51 54 57 57 0 63 0 66 60 63 60 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 60 60 51 48 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 2.734375 -1.953125 -1.953125 -1.953125 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -1.953125 -1.953125 1.171875 1.171875 2.734375 0.390625 -1.171875 2.734375 -0.390625 1.953125 -1.171875 1.953125 1.953125 -0.390625 0.390625 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="178">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.807 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.615 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.422 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 423.597 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.285 0.249 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.224 0.246 0.268 0.29 0.312 0.334 0.354 0.359 0.412 0.473 0.546 0.63 0.724 0.829 0.942 1.063 1.19 1.322 1.458 1.599 1.743 1.891 2.042 2.197 2.356 2.518 2.683 2.853 3.026 3.203 3.385 3.57 3.76 3.954 4.153 4.357 4.565 4.778 4.995 5.216 5.44 5.667 5.894 6.118 6.334 6.536 6.712 6.849 6.932 6.95 6.949 6.934 6.901 6.851 6.786 6.708 6.618 6.517 6.408 6.29 6.166 6.036 5.902 5.764 5.624 5.481 5.337 5.193 5.049 4.905 4.762 4.62 4.48 4.342 4.206 4.073 3.942 3.814 3.688 3.566 3.447 3.33 3.217 3.107 2.999 2.895 2.794 2.696 2.601 2.509 2.42 2.334 2.25 2.169 2.091 2.016 1.943 1.872 1.804 1.739 1.675 1.614 1.555 1.498 1.443 1.39 1.339 1.29 1.242 1.196 1.152 1.109 1.068 1.029 0.991 0.954 0.919 0.885 0.852 0.82 0.79 0.76 0.732 0.705 0.679 0.654 0.629 0.606 0.583 0.562 0.541 0.521 0.501 0.483 0.465 0.447 0.431 0.415 0.399 0.384 0.37 0.356 0.343 0.33 0.318 0.306 0.294 0.284 0.273 0.263 0.253 0.244 0.234 0.226 0.217 0.209 0.201

</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="6.95" PeakHeight="423.597" Num="5" zHalfNm="368.157" Error="3.952">
-189.159 -35.841 23.35 -8.388 0.863
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.422" Depth="0.154"/>
<TopsideChapman PeakHeight="423.597" PeakDensity="599286.6" PeakScaleHeight="41.093" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
