<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 13:40:00.000"
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: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.03.17 (076) 13:40:00</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">
FF202607603171340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="9.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.628" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.757" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" 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="3.330" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="351.534" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.729" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.535" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="160.272" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.702" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.916" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="181.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 205.000 213.333 221.667 230.000 238.333 246.667 255.000 263.333 271.667 280.000 290.000 290.000 294.000 298.000 302.000 306.000 310.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 322.500 320.000 330.000 327.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 342.500 345.000 347.500 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 395.000 395.000 400.000 400.000 410.000 415.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 495.000 500.000 510.000 520.000 530.000 542.338 556.387 572.528 591.267 613.286 639.528 671.338
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 0 0 0 48 45 0 0 48 51 51 0 0 0 0 48 51 54 51 57 51 54 60 60 0 60 48 48 63 60 60 54 54 54 54 0 54 57 57 57 54 54 63 0 60 57 63 60 0 0 0 45 57 0 48 57 63 54 63 66 69 66 69 63 66 63 69 66 69 66 66 69 66 66 66 63 60 57 63 63 63 60 57 57 57 57 57 57 57 57 57 60 60 60 60 57 57 54 51 48 48 51 51 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 1.953125 -1.171875 -1.953125 0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 2.734375 1.953125 -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 -0.390625 0.390625 -2.734375 -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
</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" >
89.492 90.0 95.0 100.0 105.0 110.0 111.796 113.593 115.0 115.389 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.534 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.24 2.882 3.222 3.33 3.207 3.207 3.303 3.33 3.483 3.633 3.774 3.912 4.048 4.183 4.319 4.457 4.596 4.738 4.883 5.032 5.183 5.338 5.497 5.659 5.824 5.992 6.164 6.337 6.513 6.69 6.868 7.046 7.224 7.401 7.577 7.75 7.92 8.088 8.251 8.409 8.563 8.711 8.852 8.986 9.113 9.231 9.34 9.44 9.528 9.606 9.671 9.723 9.762 9.788 9.799 9.8 9.799 9.792 9.779 9.761 9.738 9.711 9.678 9.641 9.599 9.554 9.504 9.451 9.395 9.335 9.272 9.206 9.138 9.066 8.993 8.917 8.839 8.76 8.678 8.595 8.511 8.425 8.338 8.25 8.161 8.071 7.98 7.889 7.797 7.705 7.612 7.52 7.427 7.334 7.241 7.148 7.055 6.962 6.87 6.777 6.686 6.594 6.503 6.413 6.323 6.234 6.145 6.057 5.969 5.882 5.796 5.711 5.627 5.543 5.46 5.378 5.296 5.216 5.136 5.058 4.98 4.903 4.827 4.752 4.677 4.604 4.532 4.46 4.389 4.32 4.251 4.183 4.116 4.05 3.985 3.92 3.857 3.794 3.733 3.672 3.612 3.553 3.495 3.438 3.381 3.325 3.271 3.217 3.163 3.111 3.06 3.009 2.959 2.909 2.861 2.813 2.766 2.72 2.674 2.63 2.586 2.542 2.499 2.457 2.416 2.375 2.335 2.296 2.257 2.219 2.182 2.145 2.108 2.073 2.038 2.003 1.969 1.936 1.903 1.87 1.839 1.807 1.777 1.746 1.717 1.687

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.33" PeakHeight="110.0" Num="3" Error="0.0">
-30.458 13.087 -3.137
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.33" EndFrequency="9.8" PeakHeight="351.534" Num="5" zHalfNm="231.729" Error="7.913">
-218.006 -21.837 2.212 0.314 1.172
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.389" Depth="0.123"/>
<TopsideChapman PeakHeight="351.534" PeakDensity="1191563.2" PeakScaleHeight="89.916" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
