<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-08 -098 09:30:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.04.08 (098) 09:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609804080930009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="6.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="1.460" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="9.195" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="1105.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="1105.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="81.039" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="80.978" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="2.213" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="1147.435" 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="1.760" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="714.495" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="446.102" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.016" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="364.357" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.406" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="190.263" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="424.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
1105.000 1110.000 1115.000 1116.920 1119.255 1122.156 1125.859 1130.747 1137.500 1147.435 1163.495 1193.869 1273.074
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 12 9 0 0 0 0 0 0 0 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.953125 2.734375 -0.390625 1.953125 2.734375 0.390625 0.390625 0.390625 -2.734375 -2.734375 0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.2 1.25 1.3 1.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
81.039 82.178 83.412 84.753
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
12 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="191">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
78.765 80.0 80.978 85.0 90.0 90.567 95.0 100.0 100.155 105.0 109.744 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 714.495 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.22 1.36 1.342 1.266 1.253 1.253 1.253 1.253 1.307 1.36 1.362 1.403 1.442 1.479 1.516 1.551 1.587 1.622 1.657 1.693 1.729 1.765 1.802 1.84 1.878 1.916 1.956 1.996 2.038 2.08 2.123 2.166 2.211 2.257 2.304 2.351 2.4 2.449 2.499 2.55 2.601 2.653 2.705 2.758 2.811 2.865 2.918 2.972 3.026 3.079 3.133 3.186 3.239 3.292 3.344 3.396 3.448 3.499 3.55 3.601 3.651 3.701 3.75 3.799 3.848 3.896 3.943 3.991 4.038 4.084 4.131 4.176 4.222 4.267 4.312 4.357 4.401 4.445 4.489 4.532 4.576 4.619 4.661 4.704 4.746 4.788 4.83 4.872 4.913 4.955 4.996 5.037 5.077 5.118 5.158 5.199 5.239 5.279 5.318 5.358 5.397 5.437 5.476 5.515 5.553 5.592 5.63 5.668 5.706 5.743 5.78 5.817 5.853 5.889 5.924 5.958 5.992 6.025 6.057 6.088 6.118 6.146 6.173 6.198 6.22 6.241 6.258 6.273 6.285 6.294 6.299 6.3 6.3 6.299 6.298 6.296 6.293 6.289 6.285 6.279 6.273 6.267 6.259 6.251 6.242 6.232 6.222 6.211 6.2 6.188 6.175 6.162 6.148 6.133 6.118 6.103 6.086 6.07 6.053 6.035 6.017 5.999 5.98 5.96 5.941 5.92 5.9 5.879 5.858 5.836 5.814 5.791 5.769 5.746 5.722 5.699 5.675 5.651 5.626 5.602 5.577 5.552 5.526 5.501 5.475 5.449 5.423 5.397 5.37 5.344

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.36" PeakHeight="80.978" Num="3" Error="0.359">
-3.073 1.045 -0.185
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.36" EndFrequency="6.3" PeakHeight="714.495" Num="5" zHalfNm="446.102" Error="19.129">
-552.785 -88.611 56.914 -30.783 10.514
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.766" Depth="0.107"/>
<TopsideChapman PeakHeight="714.495" PeakDensity="492431.75" PeakScaleHeight="190.263" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
