<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 22:00:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.02.12 (043) 22:00:00</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">
FF202604302122200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.390" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.959" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="577.017" 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="0.410" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="459.971" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="389.391" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.910" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.275" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.920" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.751" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="101">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 400.000 401.250 402.500 403.750 405.000 405.000 405.000 405.000 406.667 408.333 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 418.333 411.667 405.000 417.500 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 441.111 442.222 443.333 444.444 445.556 446.667 447.778 448.889 450.000 455.000 456.667 458.333 460.000 461.667 463.333 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 465.000 470.000 475.000 475.000 477.500 480.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 505.000 510.000 512.500 515.000 517.500 520.000 530.000 530.000 532.500 535.000 535.000 545.000 550.000 550.000 555.000 560.000 563.470 567.395 571.869 577.017 583.003 590.051 598.470 608.704 621.409
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 0 0 63 66 63 57 0 0 60 54 0 60 60 57 0 66 69 57 57 0 0 60 0 57 66 66 63 63 51 57 60 0 0 0 0 0 0 54 0 60 51 0 0 0 0 0 54 54 54 0 0 0 0 0 0 0 51 57 57 0 51 57 0 57 60 54 57 54 48 57 51 57 51 60 54 0 0 0 54 51 63 0 54 51 48 51 54 51 57 54 57 57 57 54 51 51 51 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.171875 0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 0.390625 -2.734375 -1.953125 0.390625 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -0.390625 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -1.171875 -2.734375 -2.734375 -2.734375 2.734375 -2.734375 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -0.390625 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.536 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.17 140.0 145.0 150.0 155.0 160.0 165.0 168.339 170.0 175.0 180.0 185.0 190.0 195.0 197.509 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 459.971 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.271 0.355 0.397 0.41 0.405 0.391 0.366 0.328 0.272 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.248 0.284 0.32 0.356 0.392 0.41 0.438 0.498 0.564 0.637 0.715 0.799 0.887 0.981 1.079 1.181 1.288 1.398 1.513 1.632 1.755 1.881 2.012 2.146 2.284 2.427 2.573 2.723 2.878 3.036 3.199 3.366 3.537 3.713 3.893 4.078 4.267 4.46 4.658 4.86 5.067 5.277 5.492 5.71 5.931 6.155 6.381 6.608 6.833 7.057 7.275 7.486 7.685 7.868 8.03 8.164 8.266 8.329 8.35 8.35 8.343 8.322 8.288 8.242 8.185 8.118 8.041 7.956 7.864 7.764 7.658 7.547 7.431 7.311 7.187 7.06 6.931 6.799 6.667 6.533 6.398 6.263 6.128 5.993 5.859 5.725 5.592 5.461 5.33 5.202 5.074 4.949 4.825 4.704 4.584 4.466 4.351 4.237 4.126 4.017 3.91 3.806 3.704 3.604 3.506 3.41 3.317 3.226 3.137 3.05 2.966 2.883 2.803 2.724 2.648 2.573 2.501 2.43 2.362 2.295 2.23 2.166 2.104 2.044 1.986 1.929 1.874 1.82 1.768 1.717 1.668 1.62 1.573 1.528 1.484 1.441 1.399 1.359 1.32 1.282 1.244 1.208 1.173 1.139 1.106 1.074 1.043 1.013 0.983 0.955 0.927 0.9 0.874 0.849 0.824 0.8 0.777 0.754 0.732 0.711 0.69 0.67 0.651 0.632 0.613 0.595 0.578 0.561

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.41" PeakHeight="110.0" Num="3" Error="0.0">
-20.474 3.246 -0.236
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.41" EndFrequency="8.35" PeakHeight="459.971" Num="5" zHalfNm="389.391" Error="2.156">
-240.292 -40.269 23.444 -5.785 0.44
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.509" Depth="0.21"/>
<TopsideChapman PeakHeight="459.971" PeakDensity="865043.44" PeakScaleHeight="52.751" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
