<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 23:00:00.000"
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 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 20% PACIFIC flags: Moderate F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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) 23:00:00</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">
FF202602601262300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.357" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.037" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.850" 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="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="608.660" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="478.080" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="407.293" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.308" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.849" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.616" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.716" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.470" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.35 8.4 8.45 8.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
400.000 400.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 417.500 420.000 420.000 420.000 420.000 420.000 420.000 422.500 425.000 430.000 435.000 435.000 450.000 450.000 450.000 455.000 462.500 470.000 475.000 472.115 469.231 466.346 463.462 460.577 457.692 454.808 451.923 449.038 446.154 443.269 440.385 437.500 434.615 431.731 428.846 425.962 423.077 420.192 417.308 414.423 411.538 408.654 405.769 402.885 400.000 400.000 403.333 406.667 410.000 432.500 455.000 470.000 466.000 462.000 458.000 454.000 450.000 455.000 460.000 495.000 515.000 535.000 535.000 535.000 550.000 555.000 560.000 560.000 563.333 566.667 570.000 570.000 573.750 577.500 581.250 585.000 590.000 595.000 595.000 595.000 600.000 597.500 595.000 595.000 595.000 590.000 590.000 590.000 585.000 600.000 603.333 606.667 610.000 600.000 601.366 603.709 608.660 626.030
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63 66 63 69 69 60 63 60 0 60 51 57 66 0 63 57 66 54 63 66 60 57 54 57 0 57 57 0 54 0 0 0 0 0 0 54 0 0 0 57 0 0 0 0 0 51 0 48 0 48 0 60 54 54 0 0 60 0 54 0 0 0 54 0 48 0 60 54 63 69 66 66 60 48 63 66 0 0 54 57 0 0 0 57 0 66 63 63 60 57 57 54 66 69 66 60 57 57 0 60 60 63 51 0 51 0
</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 -1.953125 -0.390625 2.734375 0.390625 -2.734375 1.171875 1.171875 1.171875 1.171875 0.390625 1.953125 1.953125 -0.390625 -1.171875 -1.171875 1.171875 -1.171875 1.953125 -1.171875 1.953125 -0.390625 1.953125 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.953125 -0.390625 2.734375 2.734375 2.734375 2.734375 2.734375 1.953125 -0.390625 -0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -2.734375 1.953125 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 2.734375 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.336 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.671 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.007 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 478.08 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.308 0.278 0.237 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.238 0.262 0.285 0.308 0.331 0.354 0.354 0.421 0.485 0.55 0.618 0.688 0.763 0.842 0.926 1.015 1.109 1.208 1.313 1.423 1.538 1.658 1.784 1.914 2.05 2.19 2.335 2.485 2.64 2.798 2.962 3.129 3.301 3.478 3.658 3.843 4.032 4.225 4.422 4.623 4.828 5.037 5.25 5.466 5.685 5.908 6.132 6.359 6.587 6.815 7.042 7.265 7.483 7.693 7.889 8.069 8.225 8.351 8.442 8.491 8.5 8.499 8.486 8.46 8.42 8.369 8.307 8.235 8.154 8.064 7.967 7.863 7.753 7.637 7.517 7.393 7.266 7.136 7.003 6.869 6.733 6.597 6.459 6.322 6.184 6.047 5.91 5.774 5.639 5.506 5.374 5.243 5.114 4.987 4.862 4.739 4.618 4.499 4.382 4.267 4.155 4.045 3.937 3.832 3.728 3.627 3.529 3.432 3.338 3.246 3.157 3.069 2.984 2.901 2.82 2.741 2.664 2.589 2.516 2.445 2.375 2.308 2.242 2.178 2.116 2.056 1.997 1.94 1.884 1.83 1.778 1.727 1.677 1.629 1.582 1.536 1.492 1.449 1.407 1.366 1.327 1.288 1.251 1.215 1.179 1.145 1.112 1.08 1.048 1.018 0.988 0.96 0.932 0.905 0.878 0.853 0.828 0.804 0.78 0.758 0.736 0.714 0.693 0.673 0.654 0.635

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.5" PeakHeight="478.08" Num="5" zHalfNm="407.293" Error="9.369">
-246.723 -40.747 24.121 -6.85 2.126
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.007" Depth="0.154"/>
<TopsideChapman PeakHeight="478.08" PeakDensity="896402.0" PeakScaleHeight="52.716" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
