<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 12:50:00.000"
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="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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.03.01 (060) 12:50:00</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">
FF202606003011250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.454" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.009" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="3.193" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.268" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="368.353" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.646" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.261" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="154.729" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.094" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.486" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="192.180" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 250.000 250.000 255.000 255.000 260.000 270.000 275.000 275.000 278.333 281.667 285.000 290.000 290.000 292.500 295.000 300.000 302.500 305.000 305.000 305.000 310.000 310.000 312.500 315.000 315.000 320.000 325.000 330.000 330.000 331.667 333.333 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 495.000 495.000 505.000 510.000 510.000 515.000 520.000 525.000 530.000 535.000 540.000 550.000 555.000 560.000 566.261 573.115 580.650 588.973 598.215 608.535 620.136 633.271
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 54 54 57 51 51 45 51 0 0 57 57 57 0 57 51 0 54 57 57 60 57 0 57 48 0 0 45 54 0 0 54 48 60 45 48 57 51 0 60 0 51 0 0 57 48 0 60 51 54 60 54 60 54 60 60 57 63 60 63 57 63 57 63 57 60 57 63 60 60 63 60 60 60 60 57 60 60 63 66 57 63 63 60 60 60 57 54 60 57 54 51 60 60 57 54 57 57 57 54 54 51 48 45 51 54 54 42 45 45 45 0 45 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 -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 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 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.513 90.0 95.0 100.0 105.0 110.0 112.373 114.745 115.0 117.118 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.353 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.147 2.763 3.089 3.193 3.071 3.071 3.084 3.193 3.279 3.424 3.568 3.712 3.857 4.006 4.158 4.314 4.474 4.638 4.805 4.976 5.149 5.324 5.501 5.678 5.854 6.031 6.206 6.379 6.551 6.72 6.888 7.054 7.217 7.379 7.538 7.696 7.852 8.007 8.159 8.311 8.461 8.61 8.758 8.905 9.05 9.195 9.339 9.481 9.622 9.761 9.897 10.03 10.158 10.278 10.387 10.48 10.551 10.592 10.6 10.6 10.594 10.581 10.561 10.536 10.504 10.466 10.423 10.375 10.322 10.264 10.201 10.134 10.064 9.99 9.912 9.831 9.747 9.66 9.571 9.48 9.386 9.29 9.193 9.094 8.993 8.892 8.789 8.685 8.58 8.475 8.369 8.262 8.156 8.049 7.942 7.835 7.727 7.621 7.514 7.408 7.302 7.196 7.091 6.987 6.883 6.78 6.677 6.576 6.475 6.375 6.276 6.177 6.08 5.984 5.888 5.794 5.701 5.609 5.517 5.427 5.338 5.25 5.163 5.078 4.993 4.909 4.827 4.746 4.665 4.586 4.508 4.432 4.356 4.281 4.208 4.135 4.064 3.993 3.924 3.856 3.789 3.723 3.658 3.594 3.531 3.469 3.408 3.348 3.288 3.23 3.173 3.117 3.062 3.007 2.954 2.901 2.85 2.799 2.749 2.7 2.651 2.604 2.557 2.511 2.466 2.422 2.378 2.336 2.294 2.252 2.212 2.172 2.133 2.094 2.056 2.019 1.983 1.947 1.912 1.877 1.843 1.81 1.777 1.744 1.713 1.682

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.193" PeakHeight="110.0" Num="3" Error="0.0">
-30.352 12.932 -3.067
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.193" EndFrequency="10.6" PeakHeight="368.353" Num="5" zHalfNm="248.646" Error="4.437">
-218.274 -49.665 23.951 -9.912 2.665
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.118" Depth="0.122"/>
<TopsideChapman PeakHeight="368.353" PeakDensity="1394044.6" PeakScaleHeight="84.486" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
