<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 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 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" >
2026.01.26 (026) 22:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602601262200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.173" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.034" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="640.000" 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="0.415" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="512.596" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="418.632" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.007" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.739" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.742" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.805" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 395.000 395.000 396.818 398.636 400.455 402.273 404.091 405.909 407.727 409.545 411.364 413.182 415.000 415.000 415.000 416.563 418.125 419.688 421.250 422.813 424.375 425.938 427.500 429.063 430.625 432.188 433.750 435.313 436.875 438.438 440.000 440.000 445.000 445.000 445.000 450.000 452.237 454.474 456.711 458.947 461.184 463.421 465.658 467.895 470.132 472.368 474.605 476.842 479.079 481.316 483.553 485.789 488.026 490.263 492.500 494.737 496.974 499.211 501.447 503.684 505.921 508.158 510.395 512.632 514.868 517.105 519.342 521.579 523.816 526.053 528.289 530.526 532.763 535.000 540.000 535.000 540.000 545.000 550.000 560.000 560.000 564.000 568.000 572.000 576.000 580.000 585.000 590.000 595.000 600.000 605.000 610.000 605.000 615.000 625.000 635.000 640.000 640.000 635.000 640.000 640.000 650.000 655.000 659.771 665.583 672.819 682.075 694.333 711.339 736.513
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 54 60 0 0 0 0 0 0 0 0 0 0 57 60 60 0 51 0 0 0 0 54 0 0 0 0 51 0 0 0 60 60 54 54 57 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 0 0 60 54 51 0 57 0 0 60 0 0 0 0 0 63 51 0 0 54 48 51 54 48 48 63 60 57 57 57 51 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 0.390625 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -2.734375 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -2.734375 2.734375 1.953125 -0.390625 -0.390625 -1.171875 -1.953125 -1.171875 2.734375 -1.171875 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 2.734375 -1.171875 0.390625 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -0.390625 -1.953125 -1.953125 0.390625 -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
</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" >
92.471 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.098 140.0 145.0 150.0 155.0 160.0 165.0 168.197 170.0 175.0 180.0 185.0 190.0 195.0 197.295 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 512.596 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.274 0.359 0.402 0.415 0.41 0.396 0.37 0.331 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.25 0.287 0.324 0.361 0.398 0.415 0.452 0.511 0.567 0.623 0.679 0.738 0.799 0.863 0.931 1.003 1.079 1.159 1.244 1.334 1.429 1.528 1.633 1.743 1.858 1.977 2.101 2.229 2.361 2.497 2.636 2.779 2.926 3.075 3.227 3.381 3.538 3.697 3.859 4.022 4.187 4.354 4.523 4.694 4.865 5.038 5.213 5.388 5.564 5.741 5.917 6.094 6.271 6.446 6.621 6.793 6.963 7.129 7.29 7.446 7.594 7.733 7.862 7.978 8.079 8.164 8.229 8.274 8.297 8.3 8.299 8.291 8.275 8.252 8.222 8.185 8.143 8.094 8.04 7.98 7.916 7.848 7.775 7.699 7.619 7.536 7.45 7.362 7.272 7.179 7.085 6.989 6.891 6.793 6.694 6.594 6.493 6.392 6.29 6.189 6.087 5.986 5.885 5.784 5.684 5.584 5.485 5.387 5.289 5.192 5.096 5.001 4.907 4.814 4.723 4.632 4.542 4.454 4.367 4.281 4.196 4.112 4.03 3.949 3.87 3.791 3.714 3.638 3.564 3.49 3.418 3.347 3.278 3.21 3.143 3.077 3.012 2.949 2.887 2.826 2.766 2.707 2.65 2.593 2.538 2.484 2.43 2.378 2.327 2.277 2.228 2.18 2.133 2.087 2.042 1.998 1.954 1.912 1.87 1.83 1.79 1.751 1.713 1.676 1.639 1.603 1.568 1.534

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.415" PeakHeight="110.0" Num="3" Error="0.0">
-20.598 3.315 -0.246
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.415" EndFrequency="8.3" PeakHeight="512.596" Num="5" zHalfNm="418.632" Error="5.651">
-298.371 -33.134 20.104 -7.479 3.579
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.295" Depth="0.215"/>
<TopsideChapman PeakHeight="512.596" PeakDensity="854714.6" PeakScaleHeight="69.805" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
