<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 09:40:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.12 (043) 09:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604302120940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.225" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.378" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="321.332" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.777" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="281.695" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.343" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.550" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="96.804" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.916" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.013" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="82.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 242.500 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 251.250 252.500 253.750 255.000 255.000 257.500 260.000 262.500 265.000 265.000 267.500 270.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 287.500 290.000 290.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 310.000 311.770 313.744 315.962 318.471 321.332 324.625 328.456 332.968 338.361 344.920 353.071 363.471 377.201 396.167 424.067 469.158 554.408
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 66 66 66 66 66 66 66 66 66 66 69 0 69 69 66 63 66 0 63 63 0 63 63 63 69 66 63 72 69 69 0 66 63 60 0 0 0 66 63 51 0 0 66 69 0 60 63 66 69 57 63 66 54 0 0 69 72 66 69 60 66 69 60 66 69 66 69 63 69 66 69 69 69 72 69 69 69 69 69 69 66 66 69 66 63 57 48
</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 1.171875 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="185">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.83 90.0 95.0 100.0 105.0 110.0 115.0 119.491 120.0 125.0 128.981 130.0 135.0 138.472 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 281.695 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.189 1.539 1.72 1.777 1.739 1.639 1.639 1.639 1.639 1.654 1.727 1.777 1.836 2.015 2.183 2.346 2.509 2.676 2.848 3.028 3.219 3.425 3.648 3.894 4.168 4.473 4.812 5.175 5.54 5.877 6.17 6.413 6.613 6.776 6.908 7.014 7.098 7.161 7.207 7.236 7.249 7.25 7.247 7.234 7.209 7.175 7.13 7.077 7.016 6.948 6.872 6.791 6.704 6.613 6.517 6.417 6.314 6.208 6.1 5.99 5.879 5.766 5.652 5.538 5.423 5.309 5.194 5.08 4.967 4.855 4.743 4.632 4.523 4.415 4.309 4.204 4.1 3.998 3.898 3.8 3.703 3.608 3.516 3.424 3.335 3.248 3.162 3.079 2.997 2.917 2.839 2.763 2.688 2.615 2.544 2.475 2.408 2.342 2.277 2.215 2.154 2.094 2.037 1.98 1.925 1.872 1.82 1.769 1.72 1.671 1.625 1.579 1.535 1.492 1.45 1.409 1.37 1.331 1.294 1.257 1.222 1.187 1.154 1.121 1.089 1.059 1.029 0.999 0.971 0.944 0.917 0.891 0.866 0.841 0.817 0.794 0.771 0.75 0.728 0.708 0.687 0.668 0.649 0.63 0.613 0.595 0.578 0.562 0.546 0.53 0.515 0.5 0.486 0.472 0.459 0.446 0.433 0.421 0.409 0.397 0.386 0.375 0.364 0.354 0.344 0.334 0.324 0.315 0.306 0.298 0.289 0.281 0.273 0.265 0.257 0.25 0.243 0.236 0.229 0.223 0.216 0.21 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.777" PeakHeight="110.0" Num="3" Error="0.0">
-28.693 10.62 -2.097
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.777" EndFrequency="7.25" PeakHeight="281.695" Num="5" zHalfNm="214.343" Error="3.429">
-145.851 11.14 -15.367 7.849 -0.994
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.472" Depth="0.138"/>
<TopsideChapman PeakHeight="281.695" PeakDensity="652140.2" PeakScaleHeight="54.013" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
