<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-21 -052 03:40:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.02.21 (052) 03:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605202210340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="35.052" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" 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="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="305.673" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="252.796" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.802" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.748" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="45.163" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.719" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.904" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="165">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 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 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 205.714 206.429 207.143 207.857 208.571 209.286 210.000 209.000 208.000 207.000 206.000 205.000 205.000 205.000 205.000 205.000 205.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 215.000 215.000 215.000 215.000 210.000 210.000 210.000 210.833 211.667 212.500 213.333 214.167 215.000 215.000 215.000 216.250 217.500 218.750 220.000 215.000 215.000 216.250 217.500 218.750 220.000 220.000 220.000 220.000 220.000 215.000 215.000 216.667 218.333 220.000 220.000 220.000 220.000 220.000 220.000 221.667 223.333 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 226.667 228.333 230.000 232.500 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 302.584 305.673 309.430 314.097 320.053 327.916
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 0 0 0 0 0 0 0 0 0 0 78 0 0 0 0 72 69 0 0 51 0 0 0 0 0 0 0 75 75 63 0 63 69 75 75 75 0 0 0 0 0 66 66 66 0 0 0 57 72 0 0 0 0 66 66 0 0 69 69 0 0 54 72 72 0 0 69 72 0 0 69 51 51 72 72 0 72 72 0 63 0 66 69 0 0 69 0 60 0 63 66 66 66 0 69 75 72 66 66 72 72 75 60 63 66 69 72 75 75 78 75 78 75 75 75 75 78 78 75 78 75 75 78 66 69 72 75 72 60 63 69 72 69 60 66 69 72 72 72 69 69 60 66 69 72 63 69 72 63 69 69 63 69 69 66 69 69 0 69 66 57 48 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 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 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="102">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.167 135.0 140.0 145.0 150.0 154.333 155.0 160.0 165.0 170.0 175.0 176.5 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 252.796 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.348 0.331 0.3 0.25 0.219 0.219 0.219 0.219 0.219 0.219 0.223 0.254 0.284 0.314 0.345 0.354 0.515 0.78 1.257 2.192 3.278 4.249 5.131 5.954 6.731 7.464 8.145 8.758 9.274 9.657 9.868 9.9 9.891 9.811 9.657 9.442 9.178 8.876 8.546 8.197 7.835 7.468 7.099 6.733 6.374 6.024 5.684 5.357 5.042 4.742 4.455 4.183 3.925 3.68 3.45 3.232 3.026 2.833 2.652 2.481 2.321 2.171 2.03 1.898 1.774 1.659 1.55 1.449 1.354 1.265 1.182 1.105 1.032 0.964 0.901 0.842 0.786 0.735 0.686 0.641 0.599 0.559 0.523 0.488 0.456 0.426 0.398 0.372 0.347 0.324 0.303 0.283 0.264 0.247 0.231 0.215 0.201

</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="9.9" PeakHeight="252.796" Num="5" zHalfNm="221.802" Error="2.367">
-85.189 10.141 0.475 -3.563 1.84
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="66.5" Depth="0.135"/>
<TopsideChapman PeakHeight="252.796" PeakDensity="1216005.0" PeakScaleHeight="22.904" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
