<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 17:40:00.000"
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: 90% PACIFIC flags: 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) 17:40:00</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">
FF202602601261740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.316" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.393" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="585.000" 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="3.122" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.233" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="394.354" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.129" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.212" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="158.377" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.946" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.107" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="215.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="87">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 365.000 365.000 370.000 375.000 380.000 385.000 385.000 385.000 385.000 390.000 385.000 387.500 390.000 392.500 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 415.000 415.000 420.000 422.500 425.000 425.000 430.000 430.000 435.000 438.333 441.667 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 485.000 490.000 495.000 500.000 500.000 510.000 515.000 515.000 525.000 530.000 530.000 540.000 545.000 550.000 550.000 555.000 555.000 555.000 565.000 570.000 570.000 575.000 580.000 585.000 585.000 595.000 595.000 600.000 605.000 615.000 620.000 625.000 634.306 645.274 658.393
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 51 54 0 54 48 51 0 51 57 54 0 57 0 51 57 57 54 57 60 60 54 60 57 57 48 54 48 0 51 57 48 57 51 0 0 48 54 51 48 57 54 48 60 57 66 63 57 63 63 57 57 60 60 60 51 51 57 57 54 60 54 51 48 60 57 63 60 57 57 60 54 57 45 57 45 54 51 48 48 51 51 51 45 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 2.734375 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.525 90.0 95.0 100.0 105.0 110.0 112.682 115.0 115.365 118.047 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 394.354 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.099 2.702 3.02 3.122 3.0 3.0 3.0 3.122 3.195 3.36 3.508 3.647 3.782 3.913 4.044 4.173 4.302 4.431 4.56 4.689 4.818 4.948 5.079 5.209 5.34 5.471 5.602 5.733 5.864 5.995 6.126 6.257 6.387 6.517 6.647 6.777 6.906 7.035 7.164 7.293 7.422 7.55 7.679 7.807 7.936 8.064 8.193 8.322 8.451 8.58 8.709 8.839 8.969 9.099 9.229 9.358 9.486 9.611 9.733 9.847 9.949 10.031 10.084 10.1 10.1 10.096 10.086 10.07 10.049 10.022 9.989 9.952 9.911 9.864 9.814 9.759 9.701 9.639 9.574 9.505 9.434 9.36 9.283 9.204 9.122 9.039 8.953 8.866 8.777 8.687 8.596 8.503 8.409 8.315 8.219 8.123 8.027 7.93 7.832 7.735 7.637 7.539 7.441 7.343 7.246 7.148 7.051 6.954 6.858 6.762 6.667 6.572 6.477 6.384 6.291 6.198 6.107 6.016 5.926 5.836 5.748 5.66 5.574 5.488 5.403 5.319 5.236 5.154 5.073 4.992 4.913 4.835 4.757 4.681 4.606 4.531 4.458 4.385 4.314 4.243 4.174 4.105 4.038 3.971 3.905 3.841 3.777 3.714 3.652 3.591 3.531 3.472 3.413 3.356 3.299 3.244 3.189 3.135 3.082 3.029 2.978 2.927 2.877 2.828 2.78 2.733 2.686 2.64 2.595 2.55 2.506 2.463 2.421 2.379 2.338 2.298 2.258 2.219 2.181 2.143 2.106 2.07 2.034 1.999 1.964 1.93

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.122" PeakHeight="110.0" Num="3" Error="0.0">
-30.295 12.849 -3.029
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.122" EndFrequency="10.1" PeakHeight="394.354" Num="5" zHalfNm="269.129" Error="4.791">
-231.191 -70.974 31.192 -7.715 2.381
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.047" Depth="0.122"/>
<TopsideChapman PeakHeight="394.354" PeakDensity="1265632.8" PeakScaleHeight="88.107" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
