<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-16 -047 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: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.02.16 (047) 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">
FF202604702160940009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="7.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.174" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.965" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="2.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.900" 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="34" Val="125.000" Name="h`Es" 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="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" 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="1.777" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="287.878" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.436" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.550" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="95.466" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.773" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.384" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.290" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.790" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.600" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 245.000 245.000 245.000 245.000 245.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 250.000 245.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 257.500 260.000 260.000 260.000 261.667 263.333 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 278.333 281.667 285.000 285.000 280.000 283.333 286.667 290.000 290.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 305.000 310.000 310.000 310.000 313.750 317.500 321.250 325.000 325.000 325.000 330.000 330.000 335.000 335.000 345.000 350.000 355.000 360.000 365.000 380.000 385.000 400.726 422.447 454.397 506.029
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 63 69 72 69 69 66 66 72 72 72 69 69 66 66 69 57 0 63 54 0 63 60 0 69 66 63 66 60 60 60 72 69 66 0 54 54 69 0 0 63 0 63 0 0 0 0 0 0 0 54 57 0 51 0 0 57 0 66 0 0 48 57 60 0 0 57 72 66 63 48 57 66 63 66 57 45 66 60 0 0 0 54 60 69 60 66 60 69 66 63 75 66 57 66 63 69 60 51 54
</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 1.171875 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 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 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 110.000 113.000 116.000 119.000 122.000 125.000 125.000 126.667 128.333 130.000 131.667 133.333 135.000 130.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 0 0 0 57 60 0 0 0 0 0 48 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625 -2.734375 2.734375 -0.390625 0.390625 0.390625 -0.390625 -2.734375 0.390625 -1.953125 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="184">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.83 90.0 95.0 100.0 105.0 110.0 115.0 119.485 120.0 125.0 128.971 130.0 135.0 138.456 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 287.878 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.189 1.539 1.72 1.777 1.74 1.64 1.64 1.64 1.64 1.655 1.727 1.777 1.827 1.974 2.11 2.245 2.383 2.527 2.68 2.844 3.022 3.218 3.437 3.682 3.957 4.264 4.599 4.953 5.308 5.649 5.965 6.249 6.501 6.721 6.912 7.075 7.212 7.324 7.413 7.479 7.524 7.546 7.55 7.549 7.537 7.512 7.477 7.43 7.374 7.309 7.236 7.155 7.067 6.974 6.875 6.771 6.664 6.552 6.438 6.321 6.203 6.082 5.961 5.839 5.716 5.593 5.47 5.347 5.225 5.104 4.984 4.865 4.747 4.63 4.516 4.402 4.291 4.181 4.073 3.968 3.864 3.762 3.662 3.564 3.468 3.375 3.283 3.194 3.106 3.021 2.937 2.856 2.776 2.699 2.623 2.55 2.478 2.408 2.34 2.273 2.209 2.146 2.085 2.025 1.967 1.911 1.856 1.803 1.751 1.7 1.651 1.603 1.557 1.512 1.468 1.426 1.384 1.344 1.305 1.267 1.23 1.194 1.16 1.126 1.093 1.061 1.03 1.0 0.971 0.943 0.915 0.888 0.862 0.837 0.813 0.789 0.766 0.743 0.721 0.7 0.68 0.66 0.641 0.622 0.604 0.586 0.569 0.552 0.536 0.52 0.505 0.49 0.476 0.462 0.448 0.435 0.422 0.41 0.398 0.386 0.375 0.364 0.353 0.343 0.333 0.323 0.313 0.304 0.295 0.287 0.278 0.27 0.262 0.254 0.247 0.24 0.233 0.226 0.219 0.213 0.206 0.2

</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="7.55" PeakHeight="287.878" Num="5" zHalfNm="220.436" Error="3.379">
-144.352 2.418 -11.537 3.104 0.945
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.456" Depth="0.137"/>
<TopsideChapman PeakHeight="287.878" PeakDensity="707227.06" PeakScaleHeight="52.384" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
